Wow, #Gentoo moving from GitHub to Codeberg is cool. Haven't run Gentoo for years now but still have a soft spot for it (I learned so much running it as main driver).
I also use Codeberg für my code (and joined the association) but we can't just "move everything to Codeberg". That's neither sustainable nor a good model. We should have more associations like Codeberg to offer those kinds of services. Create a whole web of forges for collaboration while we can watch GitHub go to hell.