Depends in part on the game and in part on preferences.
The fact that the moveset in SMB3 is so basic is part of the appeal for me - can’t wall jump, can’t double jump, can’t stomp jump, cant reverse flip etc. The soundtrack stands the test of time, the graphics less so (would be interested to see the All Stars version)
Also as said above… I never got further than World 2-4 as I only ever played it in the Early Learning Centre in Fareham’s shopping centre, so being able to see the whole game appeals as well.
Totally get what you say though… I’m not desperate for these games, they’re just a bonus.