I for one would love to hear someone relate their experiences with CR, XP budget and difficulty who isn't using magic weapons, or who is at least using them in a minimal sense... Maybe I've missed it in this thread but if so could someone point me to the post? I for one am a believer in magic items actually making characters better (which means yes they perform above the baseline the game expects) otherwise what's the point, if the challenge accounts for them then IMO they are little more than ornamentation. Thus I find it a little bit of a dichotomy for DM's to make the claim that CR is borked while handing out numerous and powerful magic weapons to their players... yeah it's easier, that's what magic weapons do make challenges in the game easier.
In my campaign, there are two groups of PCs. One is pure 5e....we made the PCs starting wth Lost Mines of Phandelver, and they've been adventuring since. They're currently 10th level. Here's what they have (beside a handful of potions):
- Arcane Trickster, human- Goggles of Night
- Valor Bard, human- +1 Silvered Rapier
- Champion Fighter (dual wielder), human: +1 Longsword
- War Cleric, dwarf: None
- Hunter Ranger, elf: had a dozen +1 Arrows, but now only has 4 left,
- Diviner Wizard, half-elf: None
That's all they have. As I mentioned above, they have a few random potions, and a couple of scrolls. I've intentionally kept them from having a whole lot because of the scaled nature of 5E's design. I do expect them to get a few more items soon.
EDITED TO ADD: Oh, they also had the Sunsword after completing Curse of Strahd, but they lost it while traveling on Athas. Suckers.
The high level group of PCs has more items. This is because these are "legacy characters" from prior editions who had long careers and well-established items. They're level 14 to 16. Besides consumables, here is what they have:
- Abjurer Wizard, human: Robe of the Archmage, Staff of Power, Ring of Regeneration
- Hunter Ranger/Trickster Rogue, half-elf: +2 Long Bow, Boots of Elvenkind, Handy Haversack, Ring of Mind Shielding
- Champion Fighter, human: Spellguard Shield, +2 Longsword, +1 Full Plate, Periapt of Health
- Life Cleric, Dwarf: Animated Shield, Adamantine Armor, Ring of Protection +2
Obviously this group has many more items, but I don't think it's too much for a high level group. I try to limit the numerical bonuses a bit, at least, by offering weapons or armor that provide other effects. This group is a powerful group of PCs, but I have challenged them pretty routinely.
I think it's real easy to let magic items get out of hand. Also, because the older editions went up to +5, I think some folks are still giving out items like +3 weapons in the level 10 to 12 range, which seems a bit too soon. If PCs are geared up with +2 or +3 weapons and armor, then yes, they are going to be significantly tougher and you have to expect that.