My 2s is that they're reacting to Bluesky taking centralized shortcuts that "will be fixed later". But like security and revenue, decentralization can't be "added later". Nor would the maintainers have incentive to add it later even if they could. So if people are joining just to get away from X, that's their choice. But while Bluesky is pretending that they will behave differently from X "when the time comes", then they are at best fooling themselves. They need to cast The Ring, or stop pretending that their future behavior will be any different.