Maybe it's the case, but Github has always had issues with uptime and stability.

"Always"? I don't remember it being nearly as frequent before they were bought by Microsoft, some data to back this up would be nice.

Where'd you get this from?

1) A friend in DevOps who supposedly has contacts there.

2) It's not like this push is a big secret: https://www.cnbc.com/2022/10/12/microsoft-github-relying-mor...

Where is their infra right now?