2016 was a tumultuous year. A Twitter exodus led to @sun and others first joining quitter.se and other Qvitter sites, then setting up their own servers where they didn't have to follow quitter.se rules. quitter.se admin Hannes helped them with this, you can read more about it in Robek's web.archive.org/web/2022110718… . This changed Fediverse social dynamics forever.
A few months later @Gargron launched Mastodon and mastodon.social. *This* changed Fediverse social dynamics forever. Again.
2016-10-11 I joined mastodon.social to try it out, but quitter.se was still my main.