alt Hacker NewsGitLab is often recommended when GitHub issues occur, but GitLab Cloud is not any better in terms of reliability and has plenty of outages https://status.gitlab.com/pages/history/5b36dc6502d06804c083...
GitHub also has more traffic, compare to GitLab
I think most enterprises that make the switch aren't moving to another cloud product. They're self hosting it. Otherwise, yeah, you are subject to the same types of outages.
We've had very few noteworthy incidents self-hosting GitLab. We can size our deployments as we need, and perform upgrades during maintenance windows we control.