[suizi]

Mastodon leads to centralisation.

If a Mastodon server shuts down one day and everyone on it loses their accounts, they're likely to gather around one centralised set of servers.

There is a circle of trust too. For instance, the servers a server can trust not to propagate spam or content they dislike. This raises the barrier to entry and makes existing servers suspicious of any new servers which pop up.

The centralised option can also afford lawyers to deal with issues which inevitably crop up especially in the post-230 world we're headed towards.