I like #Matrix and #Signal both for group communications, but there are still many things that #email does much better. For example, I often want to quickly preview a message to see if I want to deal with it now. If not, then I leave it marked unread. Not possible all the messenger apps I've tried. That leads to slower response times because I won't open messages until I'm fully ready to deal with something more complicated. Maybe #DeltaChat is the best direction for the long term.
@vitriolix I didn't know #Slack did that. I find Slack's UX to be over-complicated and put too much emphasis on emojis. But I also haven't used it that much. I worry about #Matrix going too much in that direction, but I would like to at least try a "preview then mark unread" UX in Matrix.