I have some questions in regards to how #Federation / #ActivityPub account discovery works with multiple hosted services and a single account e.g. user@domain.com with mastodon.domain.com, pixelfed.domain.com, someotherservice.domain.com.
Wrote a summary of web linking (AKA link relations; think rel="xxx" in a <a/> or <link/> HTML element).
The piece of the puzzle that's still unclear to me is whether WebFinger has been superseded, or maybe just generally ignored. There doesn't seem to be much adoption (except by Mastodon) or follow-on activity AFAICT.
Tried to send a message to the IETF's #WebFinger mailing list with some feedback from @feditest. Tried three different sender e-mail addresses. None of them went through. Not sure what else to try.