There was also a partial outage 2 days ago. So That they did see it that day doesn't say much either.
The reality is, hosting your own repo is a pain, and developers are looking for stability. It's also not cheap to host source code, and Microsoft are doing it for free for open source projects
They also need to handle dodgy usage of the hosting too (which they've successfully been doing).
And again, if op wants to migrate, that's up to them. I don't care about code search though for people who aren't logged in so I wouldn't move, especially since if they don't have a login, they're not contributing anything anyway
I used to host code on source forge 20 years ago using CVS, and they were free but wouldn't even let you delete any code you uploaded.