That "everyone" is just a small, vocal community if you look at the total numbers of repos on GitHub (which is still climbing)[1]
Yes, I understand that people are upset about the Copilot issues and maybe even the "frequent" outages (which usually only affect fringe parts of the site not everyone uses daily)
It's good that there are other solutions (forge, sourcehut, whatever) but most projects are still alive and very well on GitHub and my guess is that this will stay for a while.
Also, personally I have no issues with GitHub training AI on my (badly-coded and bug-ridden) code if they really want to :)
[1] https://www.reddit.com/r/github/comments/1snqyj3/is_there_an...