When I originally had a snes I played quite a lot of Mario World. That game has a save feature which allows you to save your progress whenever you finish a boss or a ghost house.
I don’t really know, but I imagine that persistent storage was part of the cartridge on the real snes.
How is that feature emulated in Lakka (default snes emulator)?
I get the sense that similar saves is only intermittently working. Saving the rom state does not seem to update the persistent storage for it.