sign in to websites using your personal web address, without having to use your e-mail address.
What is the point of that? For convenience, email addresses are much easier to come by than is web hosting. For being securely anonymous it’s also much easier to do through email — but not by so much that requiring a website rules it out, if that’s the intention.
37% of them went so far as to get a mastodon account and mention it in their twitter profile, and then maybe one third of those put some substantial effort into making it work. That’s ~90% who didn’t bother. In the one small-ish academic field where I followed some of the new arrivals on mastodon when they got there, it very much appeared to me that the failure had nothing to do with the decentralized nature of the platform. It was simply that the small number who made the transition did not add up to enough to form a critical mass and get the discussion going. Some few of them did give it a good try.