Imaro
Legend
But I seemed to have the opposite experience with 5e. As an old-school wizard expert I found 5e's spell-casting rules to be a bonanza of ways to make a powerful wizard that had the rest of the party mostly for his side-kicks. They WERE a good bit more combat-effective even at mid-higher levels than in 2e, but spell-casters still set the agenda. I think you can viably craft a 'no casters' kind of game that isn't completely nerfed, etc, which is a huge step up from 3.x and certainly a step up from 2e, in which games non-casters were all VERY definitely '2nd tier' except at low level.
Still, I wouldn't put any 5e non-caster party up against a wizard, not one played like it wants to win.
HOW?? Not being snarky or funny here either. I'm honestly curious I've been running and playing 5e for a while and I'm not seeing this at all, especially within the limits of Concentration. I honestly think a party of...or possibly even a single NPC ranged fighter (Battlemaster) with a Longbow and a good stealth could, if not own him, give a Wizard a nice run for his money... In fact I think A ROgue with high enough stealth and Cunning Action could as well (Unless were talking open clear field here). That Wizard isn't going to be able to hold onto his Concentration while he's pelted and he's going to be burning through his spells quickly unless he resorts to cantrips... What I've noticed in my 5e games is that the wizard is much more effective if he's buffing the fighters and staying back so that he's not getting knocked around and having to make concentration checks.