I agree with that, except Twitter is one, mastodon is many. For example, my first attempt to use mastodon failed because all the instances wanted an email addre

I agree with that, except Twitter is one, mastodon is many. For example, my first attempt to use mastodon failed because all the instances wanted an email address and just giving that alone or using temp email was not worth it for me. With twitter, it is one "instance" and I don't have to sample a dozen to figure out which one is right so because it is just one, I setup an email and even a temp burner phone for it in the past. But the risk of having to move to another mastodon is weighty.