> all emails are shown in your feed with no need to open threads to read or reply.

Do people just sit and read email all day, surely you then have to "action" them at the very least? In which case you then have to go merrily scrolling back up to see which ones you missed whilst you weren't intently staring at your news feed of emails.

I'd be interested to know who the devs are targetting here? Is there a certain business area?