Do you happen to use Firefox? I've found a lot of my stability issues on my 6a were related to Firefox on my phone. Installing firefox beta, going to about:config, and setting apz.overscroll.enabled to false seems to have fixed all the stability issues I was having.

This is exactly the sort of reason I don’t think I could ever switch back to android.

For what its worth, this is the first time I've had such an issue with stability on Android going back to a Moto X 2014, my first Android phone.

The cheap Motorola "Moto G" phones (unlocked/no carrier bloatware) have been the best ones I ever owned. I have a Samsung Galaxy now from AT&T (not my choice) and it's horrible.