Web sites were quite stable back then. Not really much less stable than they are now. E.g. Twitter now has more issues than web sites I used often back in 2000s.
They had "beta" sign because they had much higher quality standards. They warned users that things are not perfect. Now people just accept that software is half-broken, and there's no need for beta signs - there's no expectation of quality.
Also, being down is one thing, sending random crap to a user is completely another. E.g. consider web mail, if it is down for one hour it's kinda OK. If it shows you random crap instead of your email, or sends your email to a wrong person. That would be very much not OK, and that's the sort of issues that OpenAI is having now. Nobody complains that it's down sometimes, but it returns erroneous answers.
GitHub Copilot is an auto-completer, and that's, perhaps, a proper use of this technology. At this stage, make auto-completion better. That's nice.
Why is it necessary to release "GPTs"? This is a rush to deliver half-baked tech, just for the sake of hype. Sam was fired for a good reason.
Example: Somebody markets GPT called "Grimoire" a "100x Engineer". I gave him a task to make a simple game, and it just gave a skeleton of code instead of an actual implementation: https://twitter.com/killerstorm/status/1723848549647925441
Nobody needs this shit. In fact, AI progress can happen faster if people do real research instead of prompting GPTs.