just another corporate managed behemoth. their interfaces are slick, but the federation lacking

walled garden

(Edit, For example..) Facebook control all aspects: you can only do what they want. Mastodon can be hosted and modified by anyone, it's freedom.

A closed platform, walled garden, (...) is a software system wherein the carrier or service provider has control over applications, content, and/or media, and restricts convenient access to non-approved applicants or content. This is in contrast to an open platform, wherein consumers generally have unrestricted access to applications and content. - wikipedia