Since I know a lot of people have felt that they'll miss the "being able to link (in a way that ppl know about) another post" when leaving cohost.
Well, turns out Webmention kind of fits the bill at least on paper. I have 0 experience about actually using it but it's out there and has been for a while
we did very briefly have webmentions enabled on a blog we once had
can't even remember what we wrote about - it wasn't really us, it was our predecessors
they were a serious pain to set up support for, since older blogging software has them but newer software doesn't
we found that it was basically an extra inbox we had to go through to approve things, and it was 99% spam
any experiment we'd be part of would have to do something structural to address the spam problem... this feels like something that web-of-trust might be suitable for, if the relying-party controls for it are nuanced and not just boiled down to a single number as past efforts have been...