What convention? Why is the GM not considered to be overturning convention with the no magic thing?
Again, your view seems to rely on the GM deciding the world elements ahead of time and then the players are meant to make characters within that setting, per the GM’s dictates.
But that’s not how it must be done.
There is no "must" to any of this, and no one is saying otherwise. I'm pointing out that I've run into this idea of "the player has an idea for their character that overturns some aspect of the setting" before, and in my experience it's been more of a drawback than an asset. I'm sure that it can be made to work (almost anything can be, if everyone's on board and willing to put in the effort), but I don't see it as being worthwhile for the effort involved, especially when the bulk of the benefits can be reaped in other ways that are less prone to causing problems.
The GM isn't overturning convention because the GM is (to make a major generalization) the one who figures out what the conventions of the setting are in the first place. World generation, in my experience, isn't a collaborative process. While a good GM will typically have a conversation with the players ahead of time about certain aspects of it, they're ultimately the ones who have to do most of the work ahead of time. If they're the ones who ultimately arbitrate, then they're not overturning anything, unless it's some aspect of a pre-fab campaign that they're altering.
Who says they won’t? If a PC has some kind of unique aspect to them, why does that somehow make them more accomplished than others? I don’t agree with this at all.
It's not just being unique, it's being unique in a way that has them turning some aspect of how the world works on its head. When your character is a walking demonstration that how everyone thinks the world works is not in fact the case, they're much more likely to stand out, which makes their impact outsized compared to the other party members.
Leg up on what? I don’t get this competitive angle you’re going with.
It's not competitive, it's comparative. If you're close friends with the first and only space alien humanity has ever seen, you're pretty much going to be defined as "that one guy who's the space alien's friend" rather than whatever your name is.
Meh. There are background options in5e that give similar benefits. There are any number of things you can come up with for characters to have a reputation or to be renowned in some way.
Which is all the more reason why you don't need to overturn some aspect of the setting to achieve that. And I'm curious what background in 5E is explicitly predicated on you being the last mage in the world?
Again, if all of this is done together, why would you expect a problem?
I think I've been pretty clear about that. It's fine if no one in the group minds, but in my experience, being supporting cast members to another PC gets old, fast.
So maybe they should work to make their characters as interesting as the last mage? Maybe the GM should work with them to give them opportunities for that to happen?
Sure, they can do that. Or they can not
have to do that extra work in the first place, because they're not being outshined by someone else from day one. I'm just sayin'.
This all sounds terribly dramatic and interesting!
SHOOT IT DOWN!!!
It might
sound that way, but again, it's another thing to experience it over and over and over during the course of play.
Two decades only? It’s been going on way longer than that.
It probably has, but my impression is that it kicked into a higher gear right around the turn of the century. But that's just me.
GM’s should, I think, consider the group’s fun and cohesion when making their setting. While it's entirely possible for them to think that it's benign to come up with a setting concept that's different from what would normally work in a given context, they should also be ready to abandon that idea if others express reservations about them...and that includes the players.
No, I like my version better. But your decision to caricature the preferences of others says more about your own outlook than theirs.
