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Ignoring the lack of updates if the game is buggy, games back then were also more focused on quality and make gamers replay the game with unlockable features based on skills, not money. I can't count the number of times I played Metal Gear Solid games over and over to unlock new features playing the hardest difficulty and with handicap features, and also to find Easter eggs. Speaking of Easter eggs, you'd lose a number of hours exploring every nook and cranny finding them!
You don't miss those games, you miss being a kid playing those games.
I still go back and play some old stuff from my childhood. Super Mario 3 is still a really good 2D platformer.
Exactly. If people missed playing those games so much, they'd be playing those games. NES games are trivial to emulate.
And this is the ultimate in survivorship bias. Super Mario 3 is often touted as the best game of an entire generation. There are a lot of mediocre NES games.