Bluesky was created by Jack Dorsey, the same tech bro who created Twitter. I think it is an absolute farce that we give these morons second chances like this. That said, it has absorbed the vast majority of Twitter's post-Elon refugees, and with Elon being closely involved with the incoming Trump administration, any Liberal politicians and institutions would be absolutely stupid to keep all their eggs in that basket. Some independent journalists (good ones, who cover free palestine demos and labor issues) I follow have already switched, shutting down their Twitter accounts for good. As time goes on, we will probably have to dip our toes in to keep getting information from some sources. Twitter is only going to become more and more of a wasteland of Nazis.
From outside looking in, the atmosphere on Bluesky seems to be very shitlib. Mastodon has its own problems, but thanks to federation the shitlibs don't run the whole game and there is somewhat of a radical cohort.
Oh, I should have edited my comment, I went looking after this and technically federation has been open since late February, but as far as i can tell you can only host personal single-user instances for now.