Move where exactly? Bitbucket and GitLab aren't that great either.
I'm affected by GitHub outages maybe once every 2 months for a couple of hours. Sure, various parts go down but it's never something super impactful to my workflow.
I am not particularly keen on github and microsoft scraping my code and re-selling it via copilot. If you own mission critical ip you can always spin up a vm and setup reliable backups using gitlab, or simply via ssh. It really is that easy to move away.
That tag line isn't for you. It's for aging C-suite exec's who like fancy sounding words.
As for not going down. Meh, at least you don't have to do on-call for it. That's kind of half the point of paying for SaaS. At the end of the day, it's just a human system.