IIUC it's federated,not decentralized. Still pretty good but if a server drops offline it will be pretty inconvenient. The communities on that server will be dead.
Matrix does better as the rooms are decentalized so can continue even if the creating server drops offline. But user accounts are still only federated.
Matrix does better as the rooms are decentalized so can continue even if the creating server drops offline. But user accounts are still only federated.