Sure. But I think we've all played games where you keep having to replay the part you've mastered over and over just to get to the part you haven't mastered. I

Sure. But I think we've all played games where you keep having to replay the part you've mastered over and over just to get to the part you haven't mastered. It's like a multi-phase boss where you can do the first 2 phases with your eyes closed, but you die really fast on the 3rd phase because you haven't mastered it yet. The problem is when the first 2 phases take 10 minutes collectively. So basically you pay a time tax of 10 minutes, have a few precious seconds of practicing phase 3 before you die and have to pay another time tax. A lot of games (not just roguelikes) fall into this trap of having unavoidable time taxes. Games that are conscious of time taxes like Guitar Hero, Celeste, Crypt of the Necrodancer, etc., usually give you some sort of "practice mode" where you can practice the part you are stuck on without paying the time tax. It's games that uncompromisingly force you to pay time taxes that I cheat at.