I agree, and that's why I was thinking that a company that is still growing and is known for their privacy practices could be good (beach-head?) at doing this (at least being able to advertise it on their own services to get some traction and feedback).

It's not like google or anyone else is going to do it. And looking at DDG traffic, it seems like it is a growing need. Then again, how to you monetize encrypted emails? contextual encyrpted ads? ;)