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!
They didn't need updates because they gave you the whole game, (usually) more-or-less bug-free, the first time!
That's some survivorship bias shit right here. I can't tell you how many shitty, buggy games I played in the days of early console and PC gaming. Even games that were revolutionary and objectively good games sometimes had game-breaking bugs, but often it was harder to find them without the internet.
Plus, don't you remember expansion packs? That was the original form of DLC.
There are different kind of DLC, and the kind that's similar to actual expansion packs is usually not criticized (or not by most).
Yeah, if a DLC isnt just content taken out of the main game (in a way that makes the main game worse) and is reasonably priced for the amount of content it contains, then it is a good way for developers to get paid for continuing development of a game after launch when it was already finished at launch.
The Witcher 3 DLCs for example were pretty good.
Oh man, while I was reading the first part of your comment I was thinking of the Witcher 3 DLCs the whole time, I'm so glad that you mentioned them at the end there!