Sure, I know a lot of projects have been on GH since before MS bought it, but they’ve owned it for quite a while now, so we really should be seeing better migration out by now, no?
Codeberg is nonprofit which seems more in the spirit of the Linux ecosystem overall. GH is for-profit…
The case of free CI/CD, visibility, and network effects are already said. So I wanna offer an anectode: someone I know is a graphic designer, who maintains a project that curate icons. Moving to Codeberg means he has to interact with PRs using the CLI, which he really does not have familiarity with. GitHub OTOH has a simple desktop client that allows natively switching across PRs, approving then in the UI, etc. It’s really, really convenient for someone who’s not a developer.
I think Forgejo-based platforms will need to work on a very good GUI client, in order to attract less technical contributors.