They probably have good discovery and trending post mechanisms. Mastodon makes it a point not to have one, which results in a wholly uninteresting feed for the average user. I’m only on mastodon, but I very rarely use it, because it mostly sucks unless you spend several, several hours trying to track down fun accounts to follow yourself.
I mean, as a millennial, I mostly taught myself to type. I’m fast enough, but have bad technique and could be faster. I was only ever actually trained to type in grade school, and barely. Once in a while in computer class we would play an educational typing game.
My mom is much better at typing than I am, because she was trained to type in college. That’s not really a thing anymore.