@rolle Yes, I would say the biggest challenge is the amount of data that is transferred there, which makes it hardly suitable for a home server. A Hubzilla installation can be set up as PHP on the side. The system does not require every user to have their own relay at home.
The question is, at what number of offerings is decentralization achieved? Are Bluesky and Blacksky sufficient, or do we also need Eurosky and Northernsky, and so on? And is it necessary for decentralization that everyone can host at home...
Basically, the statement often made in the Fediverse that there is only one AppView and that Bluesky can therefore simply pull the plug is, in my view, incorrect and, for many people, more a matter of populism.
Currently, if I am not satisfied with Bluesky's moderation of applications, I can easily switch to Blacksky.