Same. I am quite annoyed. The main featured I loved was the ability to sync multiple emails accounts to ONE account ... across multiple devices. Does anyone know of another mail app that can do that?
I have switched to Missive which does this, and seems to have every feature that Newton had (except for the priority inbox which they are working on). It's not just an email app and is focused on team communication, so I use it also with my wife for our small business. Works quite well. If you need JUST email, it would still work but price ways may be too expensive. I'm willing to pay it given that there's such a paucity of good Mail apps that do what I need