For example, random page flip into PHB... the Resistance Cantrip has a component of "A miniature Cloak", not a piece of cloth, not a cloak for a child, this sounds like someone has to have found a pixie sized, fully stiched cloak. For a cantrip that no one really uses anyways. Where do you get something like that? How much would a tailor charge to make one since a normal sized cloak isn't listed? It would easily be a couple silver, which isn't a lot but why are we bothering?
IRL "magic" rituals are full of stuff like this. I like magic to have these weird associations. Most adventurers can sew. It is assumed they mend and make simple items as they travel. It would not be difficult to stitch together a small cloak. It needn't be perfect. And, yes, I do love the idea of a wizard trying to trade or steal a pixie's cloak. It is a fun role-playing opportunity.
Or what about something like Hex requiring a petrified eye of a newt. How would you ever aquire that? Cast petrify (a 6th level spell requiring lime [I assume the caustic chemical not the fruit] water and earth) on a newt and then chiseling out if eyeball?
Good creative thinking! Hopefully your mentor is high enough level to provide one to you. But maybe you have to go get a newt for him to petrify for you.
See, this is why I LOVE making components matter. My D&D games need more newt hunts!
Chromatic Orb is one that constantly annoys me, because players like to take it at first level, but it requires a diamond worth 50 gold. No 1st level character is capable of affording that, so if I didn't hand wave it away then when my sorcerer got excited to cast their spell for the first time I'd have to tell them, "oh sorry, you aren't rich enough to cast that spell you picked" and that isn't fun for anyone.
Note - I am not doing away with spell focus. Just that you have to have studied with the component before you can cast the spell with the focus. I assume that the wizards academy or higher-level caster you are learning from will have this available. Or go to jewelers and pay to let them study with a diamond for a nominal fee. If you want a backup diamond while travelling, in case you loe your focus, well, you need to find a way to get one.
Then you get the something like Barkskin "a handful of oak bark". Here you have two options, either the party finds an oak tree because they are common enough in the area, they have the item, and then they must remember they have it and mark it on their sheet constantly when remaking sheets. Or, you are in an area where oaks don't grow, and I'm not even talking desert or tundra, a lot of plants have very specific biomes and if you don't want to just handwave it then you need to determine if this setting would support oak trees that the party could find. Then, after they have it.... it doesn't matter. It's just a gotta check "I cast barkskin" "Wait do you have Oak Bark on you" "Yes" "Is it on your character sheet". Is going to get old. Same with a lot of those, Yew Leaves for Detect Poison, Sumac leaves for Flameblade, wychwood for Dancing Lights, Licorice root for Haste (I don't even know what that is). Do all these grow in the same environments, how hard are they to actually find?
Again, not an issue for me.
1. No oaks in your area? I smell a plot hook.
2. Someone else may have some and sell it to you or your mentor may let you borrow to study with it and then you use your focus to cast thereafter.
3. Upthread there was a recommendation to allow players to propose alternative components and make a skill check with an alchemist set to see if they can figure out how to cast the spell with the substitute. I'm all for that! So then, yes, try with the bark from other trees.
4. My players use DnD Beyond, so no copying from one sheet to another. I trust them to manage their own inventories. If I wanted to, I suppose I could review their DnD Beyond sheets, but if I felt the need to do that, I wouldn't be playing with them.
Also you get stuff like Banishment which requires "An item distasteful to the target". Which is going to be... what? We had a game where our cleric banished a Giant Ape so we could get into the tower it was guarding and fight it through the doorway. We didn't expect to fight a Giant Ape, so we didn't grab "something distasteful to this Giant Ape" and even if we did know, how are we supposed to know what to get? If they need to have the material component first, does just getting it for one creature work, what is distasteful to Bjorn the City Watchmen that the Cleric Banished so he wouldn't get hurt, do you know? It becomes a mess.
You do research. You make a nature check. You do trial and error. Banishment is an annoying, broken spell without this limitation. Even with a focus, I would say, you need to bring to mind something distasteful to the creature that you have actually physically held in the past. Which is great for role-playing. If give the wizard an incentive to play around with every disgusting thing he comes across so he can properly envision it when casting the spell.
And the end result is either nothing changes from normal, because players either pick spells with easy components that they can quickly find and then use their focuses throughout, or you have spellcasters unable to cast their spells.
Hey, that's their choice. But if you want to have banishment, you better start getting up close and personal with a lot of gross stuff. Sure, most will rely on there focus...until they have it stolen or destroyed. I'm not going to cry from them. They can still cast spells without material components and they could have stocked up on some back up material components. A fighter that gets disarmed doesn't have as many backup options.
Also, if you are targeting focuses.... shouldn't you also target component pouches? It'd be even better for the enemy since then the caster might not be able to cast any spell at all.
ABSOLUTELY! Why is everyone making the enemies so damn polite. Disarm the fighters! Steal/destroy/cast away the wizards pouches and wands. Make the party think more tactically. Have backups to your backup. Take measures to make it difficult to steal your components and focus.
Not sure how much fun it is for the player though, especially if you don't do similar by trying to disarm fighters and break arrow quivers for archers. Though, picking up most weapons is a non-action once per turn so in the end disarming them alone doesn't do anything, you also got to steal the stuff and then you are mostly rolling athletics checks to wrestle over their weapons and items instead of actually damaging each other, which just drags things out.
Depends on the players. I don't think it would go over well at AL night at my local FLGS. But for my home game, we find combat far more interesting. You also need to keep an eye out for ambushes and pickpockets. Maybe the "simple" goblin encounter turns out not to be a simple beat down when one of them grabs your staff and runs off with it. Now you have chase him into the goblins' lair, where you are over numbered. You have to find your staff while avoiding getting mobbed in the tunnels. Or, the party determines it isn't worth the risk, the wizard relies on the components she has, until she can get to a place where she can buy or make a new staff.
I personally just don't see the value in it for the occassional "Oh, the wizard goes to the graveyard to get more grave dirt for that spell. That's a cool character scene."
I'm not saying that each and every component has to be a side quest. In fact, obtaining many components will be a downtime activity. But it gives additional tactical considerations that add to more interesting combats. It balances out some spells like banishment. And it does give a wealth of plot hooks and role-playing opportunities.
But, if the players don't want to deal with it, then, like encumbrance, it can be handwaved. But many people enjoy the resource management aspect.