I think the default position people like to take generally is to just go with the status quo. GitHub has reached status quo level. As in "nobody ever got fired for choosing GitHub". It's the only forge I've seen advertisements for in the meatspace, and even non-technical people know about it. On job applications, companies ask for my GitHub URL. I think it'll be awhile now before they get abandoned. That said, I recently started moving my stuff over to Codeberg. The change needs to start with us, the people writing software.