I'm someone who didn't like the attunement mechanic to begin with, but I've mostly come around when seeing it in play and thinking about the design purposes it serves (still a few minor issues with it, but its gains are pretty big).
Ultimately, if you're handing out enough magic items that people are running up against their attunement limit regularly, you're running a high-magic game. That's kind of the only place where that limit even becomes a consideration.
And one of the things to understand about the limit is that it is there so that the party doesn't become too powerful to be challenged. Magic items in 5e are a raw boost to your power. They are not required to do things, they are a straight-up increase.
So if you're running a high-magic game and you dropped attunement limits, your game would mainly become significantly easier.
That's not necessarily a problem if you're playing more for story than for challenge, and you don't mind the occasional "boss fight cake-walk."
But if you like a game of death and risk and the like, you probably want to tell them to simmer down.
You might also want to not reward as many magic items - even if you roll them or whatever, your party is clearly swimmin' in 'em.
That, plus send a thief in the night to steal their stuff.![]()
The amount of magic I've given is actually a little less than I've given in my Dragonlance game. This is really only about one character...he just happens to be the one who is the "right one" to receive the items he has...a magic bow that requires attunement, a Cloak of Displacement, and a magic short sword that requires attunement. There are a set of Bracers of Archery that he has, but he can't attune those and the other three items, and he's complaining very vociferously about it (I quote, "WoTC designers are smoking crack!").
Much of what you guys have said are the very same arguments I have made. One of my ideas was to allow one extra slot of attunement at 9th level (when their next proficiency bonus hits), though I do really like the idea of the feat...they want the extra magic slot, they have to give up one of their precious feats.