Thanks & totally agree: E-mail is neither broken or bad and we need to construct better email clients. Airmail is really good for your individual addresses. Here at Front we try to create the first collaborative email client for companies.
I read that and thought "what does that even mean? Yet-another-busted-calendar thing?"
Turns out it's actually multiplayer inboxes. Neat! Are you going to release an API so the diehard Emacs users et al can work with everyone else?