As a developer who ditched Github and decided to self-host, there is only one reason. It's not technical difficulties, politics, nor AI. It's Microsoft. Like Apple, Facebook etc, I have a deep loathing for Microsoft and I want to remove as much of it from my life as I am able.
I now run Git on a pi using Gitea and Forgejo. I can now upload files of a size unheard of in GitHub, Claude can make a PR by itself that I can diff, edit, then merge, and even with the mighty power of a single pi 3b+, it feels more responsive.
Why Gitea _and_ Forgejo, rather than just one or the other?
Microsoft is a mafia that sometimes produces code (poorly).
Microsoft's human rights stain will take decades to wear off (just like Meta, Google, and Amazon).
Eh, the stain will only grow worse over time.
They certainly are not doing anything to start bleaching it right now.