Matrix-EmailBridge VS matrix-bifrost

technically not true. During the last AMA, Eric mentioned this: https://github.com/JojiiOfficial/Matrix-EmailBridge I am not technical enough to try that, but if anyone feels brave and is happy to report back how to for a total ignorant like, that'd be great.

Already in the works :) https://github.com/JojiiOfficial/Matrix-EmailBridge

tbh Matrix was pretty green 5 years ago, so you probably didn't miss much. Thanks for considering a slidge-matrix bridge. On the Matrix side, we already have https://github.com/matrix-org/matrix-bifrost as our main Matrix<->XMPP bridge, but it could definitely be better, and the more interop between open protocols the better \o/ :)

Unfortunately XMPP<->Matrix end-to-end encryption is a contradiction in terms. You have to speak the same protocol from end-to-end, otherwise you'd have to break the end-to-end encryption to translate from one protocol to the other. The closest you could get would be to run the Matrix<->XMPP bridge clientside alongside your Matrix client... but at that point you might almost as well be running a multihead messenger that speaks both Matrix & XMPP.

In terms of adding Matrix to MUCs; i believe we're working on it in Bifrost, which is in active albeit slightly sporadic dev: https://github.com/matrix-org/matrix-bifrost.

Matrix itself looks like it may be able to serve xmpp via this bridge

Yes, there is: https://github.com/matrix-org/matrix-bifrost/wiki/Address-sy...