Super Mario World is insanely replayable despite not being that difficult. It has tons of secrets, an ambitious overworld map for its time (really the first like that for the platforming genre, its such an advancement over Mario Bros 3), great music, lots of options in terms of how to advance to beat the game (special star levels, warps, the ability to skip some sections of levels and get special keys, etc.)
Super Mario World is unmatched
if Nintendo dedicated themselves to making a new iteration of Super Mario World with a different map and a bit more difficulty but maintained the level quality that that game had, I would be thrilled







