one more review with some input (underscoring mine):
BlackBerry KEYone review: Coming home | Android Central
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Everything you need to know about the KEYone's software features
BlackBerry's other apps do a damn fine job replacing Google's own versions, too; from the calendar to an excellent task manager, they're simple and well-designed, and leave no glaring holes compared to what you'd get on a Pixel or a Galaxy.
And they sync with Exchange, so they'll work with your existing office setup. You do have to contend with BBM being pre-installed, but if you're going out of your way to buy a KEYone, you may also be one of the people maintaining a presence on BlackBerry's once-ubiquitous messaging service.