An anecdote that will probably sway no one: was in a family friendly barcade and noticed-- inexplicably--a gaggle of kids, all 8-14, gathered around the Pong. Sauntering up so I could overhear their conversation, it was all excited variants of "It's just a square! But it's real!","You're touching it!", or "The knobs really move it."
If you wonder why we no long we have "twitch" games, this is why. Old school games had a tactile aesthetic lost in the blur of modern lag.
Celeste is not really the same sort of thing, and compared to e.g. IWBTG fangames it feels a bit like playing a platformer while covered in glue. IWBTG fangames themselves probably feel similar to people who are used to playing Super Smash Brothers Melee for the Nintendo GameCube because those people play on CRTs which eliminates a couple frames of latency compared to LCDs.
If you wonder why we no long we have "twitch" games, this is why. Old school games had a tactile aesthetic lost in the blur of modern lag.