1. GitHub itself isn't opensource despite being the opensource forge.
2. Microsoft (of all companies) acquired it.
3. Microsoft pushes VSCode and kills GitHub's Atom.
4. GitHub employees are quite political (master branch rename, ICE protest resignations, etc).
5. GitHub striking down repositories and user accounts (the Russian developer, yt-dlp, etc).
6. LLMs trained on public and private code without consent or opting in.
7. GitHub forcing AI agents in pull requests and in various pages on GitHub.
8. GitHub's CEO resigning and now in more of Microsoft's AI control.
I left back when GitHub was acquired by Microsoft. I wondered if it was a mistake for me to leave, but.. I haven't regretted it yet.