While I am enjoying Mastodon well enough, I remain unconvinced that it is fundamentally different from Twitter from a user perspective.
I get the value of a federated architecture and how it prevents a single person or company from owning and controlling the platform, although my guess is that if Mastodon continues to grow, power will end up consolidating around a small number of large instances.
Mostly, I am guessing that as usage grows, Mastodon will start seeing the same sorts of problems, anti-patterns, and bad behavior that have plagued Twitter. I think scale is the problem. I don’t think humans are built to be constantly connected with one another in groups that size.