I find that so fascinating... I know GitHub since decades.
Over said decades I've worked on countless (open source) projects there.
Professionally? 1 project in all those years. Yes, exactly 1 (still there).
Every single other project was either in bitbucket, gitlab, gitea, forgejo or... I am sure I forgot some forge.
What I am trying to convey is: fascinating how "everything is on GitHub" is a very american way to see the world.
Ironically, I was thinking that the Github downtime is an American view in and of itself. For us living in the European time zones, Github is hardly down during our business hours. It's mostly down during US business hours, then demand is highest.