I really like this idea (and I feel like it ties in with some of the recent agency-in-games discussions, albeit on a meta level). I remember playing a game or two that had “undo” disabled, and it irked me a bit that the author was attempting to control my experience to that extent. But if the game starts out by saying “This game is meant to be played without using undo, but it’s your choice whether you want to play that way or not”, I’ll appreciate having the agency to choose how I engage with the game, and because of that I’ll very likely play it with no “undo” as the author intended.