It was the best of times, it was the worst of times.

Best/better because yes, QA actually existed and was important for many companies - QA could "stop ship" before the final master was pressed if they found something (hehe as it was usually games) "game breaking". If you search around on folklore or other historical sites you can find examples of this - and programmers working all night with the shipping manager hovering over them ready to grab the disk/disc and run to the warehouse.

HOWEVER, updates did exist - both because of bugs and features, and because programmers weren't perfect (or weren't spending space-shuttle levels of effort making "perfect code" - and even voyager can get updates iirc). Look at DooM for an example - released on BBS and there are various versions even then, and that's 1994 or so?

But it was the "worst" in that the frameworks and code were simply not as advanced as today - you had to know quite a bit about how everything worked, even as a simple CRUD developer. Lots of protections we take for granted (even in "lower level" languages like C) simply didn't exist. Security issues abounded, but people didn't care much because everything was local (who cares if you can r00t your own box) - and 2000 was where the Internet was really starting to take off and everything was beginning to be "online" and so issues were being found left and right.

"everything was local"

This was the big thing. There were tons of bugs. Not really bugs but vulnerabilities. Nothing a normal user doing normal things would encounter, but subtle ways the program could be broken. But it didn't matter nearly as much, because every computer was an island, and most people didn't try to break their own computer. If something caused a crash, you just learned "don't do that."

Even so, we did have viruses that were spread by sharing floppy disks.