I still left my old and unmaintained projects on GitHub but I moved all my active projects to GitLab and any new projects go there too. I have them auto mirrored back to GitHub though as the more mirrors the better. I also recently set up a Codeberg mirror for some of my projects, though GitLab's CI is what is keeping me on GitLab even though they nerfed the shit out of it and made it basically a requirement to host your own runners even for FOSS projects a year or two back. Still hate them for that and if Codeberg gets a solid CI option, leaving GitLab would make me happy. They too have seen quite a lot of enshittification in the years since Microsoft bought GitHub.