This is completely not true, all those old games had tons of bugs.

I think we don't think of them as having a ton of bugs for a few reasons; one, we didn't have the social media forums to post bugs and read about them, so unless you personally encountered a bug, you wouldn't know about it. Since most bugs only trigger under rare circumstances, most people aren't going to know about them. Secondly, since we knew there were never going to be updates, we didn't think about things not working as being 'bugs' that can be fixed... they became just part of the game.