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!
Well yes, maybe going that far back it was kind of a shot in the dark, but the late ‘90 to early ‘10 period was a time where you had internet (or at least tv/magazines) to know which games were “popular”, most of those were actually well done, and you’d rarely have an AAA title launch as a bugridden mess.
Reviews are also a hit-or-miss because they’re highly subjective. The Steam review system sucks as well, being only positive/negative and with troll reviews always at the top.