That’s a good list, the question is if the zoo has expanded since 2015.
I think people might want to add “xrpc” to the list, if nothing else.
Yeah…it’s perhaps a bit nebulous, but it seems like the sort of thing that could maybe use some slightly more formal (or at least actively-maintained) curation, e.g. by IETF or something. I dunno if an RFC would be quite the right thing for it (there is 2142 as cited in the article, though it’s somewhat different in scope and intent); would a BCP maybe be a better fit?