Let's start on Mastodon
I have been on Twitter since 2008. But now after almost 15 years, I have moved to Mastodon. Just like millions of others. And I can say it is a pleasant experience. A higher level of engagement (it's comparable to Twitter in the early days), less toxic, and no ads or algorithms. And with my background in open source, absolutely love the fact Mastodon is an open-source platform.