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!
A couple years back I found my old Gameboy advanced. I tried to play Kirby on it and I was taken back by how much it sucked. The screen was way smaller than I remember it being and there was no backlight which meant I had to play the game in a well lit room. I don't think I could ever go back to those days.