(Assuming the move was due to the recent outages)

I don't know that the grass will remain green for very long anywhere in this current scenario.

GitHub is not having most of its outages because GitHub's engineers are using AI (although there might be a case or two of this). The primary driver of the outages is the fact that developers can move so much faster in their workflows. Every single user of these products is placing a heavier demand on the system. I don't think this ramping of demand will cease any time soon. I fully expect to receive an email any second now about how my 5,000 req/hr GH API quota will be cut in half before 2027.

I don't understand how GitLab would be immune from these forces, unless we were willing to reach for self-hosted & enterprise plans. Both of which GitHub offers.