Tried going back to the Priv...
Tl;dr - if you're considering going back to your old Priv, don't.
I have a Key2 (bought it when it came out, to replace my Priv). The plan was to buy whatever bb came out next but obviously that isn't happening.
Overall I like the Key2, but I don't like the screen size/quality, and I definitely don't like the camera quality. The Priv absolutely destroys the Key2 in these areas, and the camera has become a bigger priority for me after the birth of my child.
So, I decided to take the Priv out of the drawer. Charge her up, and do a factory reset. Transferred my calendar and contacts over, as well as some of my more often used apps. Other than that, the Priv was free and clear and ready to perform.
But man, was she slow. Wow. After the (relative) speed of the Key2 and the Oreo OS, the Priv is glacial by comparison. Anything you do on it, you have to wait a second and a half before it does it. That may not seem like a lot, but it's an eternity. Also, the back of the phone gets incredibly hot, and the battery dies quickly. In other words, these are the reasons I got the Key2 to begin with, and the problems with the Priv aren't magically fixed after a factory reset.
So I'm back to the Key2, and pretty soon I guess I'll finally be straying from the BlackBerry product line for the first time in my life. I'll stick with Android... maybe a google phone or a samsung I guess.