I mean it’s fine, use whatever your comfortable with and Bluesky is the next frontier for development ideas.
EDIT: Ask five people you know outside of tech if they have a Github account. Everyone I know outside of tech moved to Bluesky from Twitter. No one I know outside of tech has a Github account. If I encounter someone who has neither, I'm of course going to recommend a Bluesky account from a utility perspective, as they're likely never going to contribute code, issues, discussion on GH if not a tech person. (most of my network is non tech, non startup, non SV people, ymmv; HN is the closest I get to tech folks most of the time)
I’m among that 31M who signed up (as are many of my friends) and only the most left ones are still using it. I trolled for a couple of days until it got boring.