If mastodon.social carries on growing at the expense of others, the Fedi will soon be in danger, here's why: https://fedi.tips/its-a-really-bad-idea-to-join-a-big-server/
At the same time, Mastodon's server devs are creating brilliant features to help decentralise the Fediverse. The v4.5.0 release will auto-federate all replies in threads, greatly helping smaller servers.
The good stuff will be pointless if mastodon.social keeps growing. It's as if Mastodon gGmbH isn't sure what it wants: does it want to build the world's only truly decentralised social network, or does it want to make a centralised social network which is structurally destined to enshittify?
2/4