@HolosSocial Hear, hear!!
I've been advocating that it should be possible to use the same identity on all websites for -- checking notes -- 22 years now. All users get it. Developers are often strangely reluctant, like in the Fediverse today.
Would be nice if that became part of an ActivityPub 2.0. We could use more people speaking up about this in the W3C, consider joining the conversation there.