The 'success' of Bluesky caught me by surprise, I must admit that. I did not expect people who left Twitter in anger or because they were disappointed by what Twitter turned into to simply join an almost exact copy of it, under another leadership. The issue was not that Twitter was owned by a billionaire, at least not for me: the issue was that it was owned.
For me (I had been a Twitter user since it was launched), beside the good old blogs/personal websites, the Fediverse still is the sole credible alternative that I can think of that allows people to easily express themselves without being owned/controlled by any corporation and/or be treated like cattle.
That's the reason why I joined the Fediverse the day I quit Twitter (that happened a few years before Musk, I left out of exhaustion facing the constant anger/hate that had become the norm). That's also why I never considered Bluesky an option for my usage. I wanted not to reproduce the same mistake I made using Twitter. That's also why no matter how not trendy it is I do still own a personal website too ;)