In FFVII there's an optional sidequest where Yuffie is a bitch and nicks your materia, rendering you only able to use items and attack. Your reward for finishing it? NOT smurfING MUCH.

In FFVI the limitation sidequest is the Fanatics Tower, where you are only able to use Magic. Your reward is actually worthwhile, it's a nice challenge - something that FFVII lacks entirely - and I'll be damned if there aren't ways around the stipulation if you make good use of the Relic system and character choices. Smurf right off with all of this, are we really going to descend into bickering about individual things like this? It's kind of pathetic but I will stoop this low if only to prove you wrong.