@rysiek there are still Black-led networks of people and servers here -- and Bluesky has also pushed away a lot of Black people. And rapid growth here has in the past diluted the power of marginalized groups (trans and queer people most noticeably), so to the extent the growth on Bluesky is increasing Blacksky's relative power, that highlights a difference in how power is diffused there than here.
If you look at the specific dynanics of the decentralization here, it's always revolved around white dominance. Check out the pic of the invitation-only 2010 Fedierated Web Summit at the start of Before Mastodon: GNU Social and other early fediverses. For the last 6-7 years, ever since Mastodon's embrace-and-extend of ActivityPub, Mastodon gGmbH and SWICG have the instititional power -- organizations which have in practice been unsupportive of Black-led projects and Black people as individuals (which in turn reinforces the dynamics that keep chasing Black people away).
My guess is that most if not all of the people I've seen commenting on the decentralization question would agree would this characterization. But it doesn't show up in their power analyses of decentralization -- like I say In the article, the power analyses of Bluesky's and ActivityPub's different approaches to decentralization I've seen from white people are deracialized.