Interesting... I just read that Google's beta program for Android N will push an OTA version of the beta to a device. Roll back will involve a wipe. I think that I am going to try the beta on my Nexus 9.  This is the first time that Google has made a beta for Android available in this way and it will be interesting to see what havoc it causes. 

The fact that Google is doing a beta like this suggests to me that there hasn't been significant changes made underneath the covers that will causes apps to crash. 

Note to self: I clicked enroll @ 4:15 PM EST on May 18, 2016. We will see how quickly the N bits are pushed to the Nexus 9. (Uninstalled later.)