Went back to play original NES Super Mario Brothers, a game I'm not sure I've actually ever beaten, making heavy use of Switch's "rewind" feature. I had forgotten how unforging it was - probably the origin of "Nintendo Hard", the weird bad synergy between "Arcade games give you 3 lives and entertainment to fill those little bursts" and "home games now can and should have a lot of content and give many hours of playtime to make up their cost".
I gave up on world 7-4, which is a weird, unmarked puzzle that feels like an infinite loop but actually you have to take certain top or bottom paths or something. (I thought only the final 8-4 level did that.)
Supposedly the "All Star" version added in audio feedback to tell the player they chose the correct or incorrect path, but it left me with this:
Hot Take: Donkey Kong is a much better game than Super Mario Brothers.