Oh that’s nice. Hadn’t seen their stuff before but that looks like a MUCH better option than Matrix, if you want a shiny gui app and that kind of experience. And can’t argue with the pricing if you’re running an open-source project with it, though I suppose you can make a comment that it’s still got a vendor lock-in problem.
And 100% agree that email is the gold standard, still, and yeah, nobody has really come up with an amazing web UI for searching list archives.