Unpopular opinion:
I don't think we should make free and federated replacements for *every* proprietary social media site, just because we can. It's not a no-brainer.
Yes, we would get rid of corporate surveillance, but a free and federated version of site X can still be highly addictive and distracting, plus enabling all sorts of abuse if not designed properly.
I don't want to curb your enthusiasm, but please give this some more thought before jumping on the bandwagon.