Don't think of Mastodon like 1000 separate social media sites. Think of Mastodon, think of the Fediverse, like email. Lots of email goes through gmail, and maybe gmail works better with gmail. But email is more than gmail. But despite AOL's best efforts, despite google's best efforts, email is also yahoo, and outlook, and Proton, and MailChimp, and your college email address, and whatever mail server your company spun up, and if you feel like it whatever mail server you setup in your basement. And yes, email has had more complications over the years as google tries to strangle it. But it's the real open platform, and the Fediverse can join it.