folker.schamel.com#activitypub is the reason for these advantages of #mastodon. The truly #decentralized architecture makes the barrier to entry low.
In #atproto, on the other hand, relay and #moderation are not decentralized, but each alternative provider processes and moderates the entire social network.
This architecture of #atproto will realistically ensure that there will never be real alternatives to #bluesky.
In other words, #atproto only appears to be #decentralized on paper. In practice, it is probably trapped in #centrality.