Yes, things are still moving fast. AFAIK the final 1.0 version of the protocol spec was only released last Summer.

The "I missed message because I only use xxx for that one thing" is valid for every app as long as you have fragmentation in the messaging space I think. That's why I like the idea of using the same client for a multitude of services through bridges, and not forcing people to necessarily use your network (even if they should :p)

How do you deliver end-to-end encryption in a federated architecture like that?

You can peek at : https://matrix.org/docs/develop/ tldr; similar to signal afaik

The docs there for E2E are fairly old but get you an idea how it works. E2E has improved a lot in the last few months IMHO.

Interesting point, I am going to assume there is an option or bridge or plugin or something that can send an email notification that you or your group / chat room has new messages(?) - and this may be an important, perhaps default selected, option for new users trying out a matrix flavor(?)

I remember when fbk would send messages to everyone, some of my clients had a hundred emails a day from fbk in their inbox, and they were checking in several times a day, now it's become a habit regardless I think for most.

Getting emails likely would have pissed them off.

So we need an easy toggle, and option to do this via email reply.. and option to change notifications from each message into twice per day or once an hour or other options.. I think that would satisfy most people.

I hated emails from fbk and turned them all off long ago, but some people seem to like that kind of thing, so we might need options, and options for those who want a reminder but not a bunch of reminders everyday.

I'm impressed you were able to accomplish some specific thing you wanted to do using the FB settings.

funny thing about that, some time ago I tried to figure out how to stop all messages from fbook to my email, after menu hopping for some time, I allowed my gf to go into the settings and turn it all off and turn on many privacy settings. I know fbook has changed the privacy things several times since then, but I don't use it enough to have any issues I think.. I also don't use messenger app or fbook mobile, so I've gotten lucky (and helped) to get zero messages from them for years.