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!
It's a nostalgia thing - I don't remember the games where I got stuck on the first level and could never finish the game (which happened). Or were just boring so I quit after a half hour.
I do remember donkey Kong country, super Mario bros, sonic Etc. Which all worked well and were fun.