Tho, I still have doubts. Some of the people I follow are still confused by Mastodon. A UX agency was hired to improve the sign up experience on the official app and it still falls flat. It doesn't have to be this confusing. Yahoo, Hotmail, and Gmail made email understandable to the average user.
I can suspect the language of Mastodon contributes to the confusion. We talk about Mastodon as if it’s a singular site: “I’m on Mastodon.” However, you don’t say, “I’m on email,” you say, “I have an email account on Gmail.”