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The Psychology of Mastodon: The Great Migration From Twitter
(www.psychologytoday.com)
A community dedicated to fediverse news and discussion.
Fediverse is a portmanteau of "federation" and "universe".
Getting started on Fediverse;
Yes, maybe. Could depend on your expectations though. As far as I am concerned Lemmy is a content article reader, while Mastodon (and Pleroma, Akkoma) are for me in general be more about connecting with people and organizations and sometimes following activities of friends.