Originally Posted by Dimers
How about the legacy of arcane spell failure for armor use? When 4e came out, I thought that ridiculosity had ended, but no, it rears its stupid head in the 5e playtest too ... From a balance perspective, I can sorta kinda vaguely understand it (but can't understand why they would then allow workarounds), but there is no in-game reason for it that can't get logicked away in two seconds.
As far as I can tell, it's just a stupid stereotype enforcement thing. Classic fantasy wizards like merlin and gandalf didn't go into battle in full plate, so your wizard can't either.
(By the way, where in the 5E playtest does it mention ASF? I don't remember seeing it anywhere.)