The last straw for me was a few years ago when my podcast suddenly stopped playing. When I unlocked the phone to investigate why the episode had stopped the UI had completely changed, in a way that I was completely lossed and had to start over learning it from scratch. I was right at the beginning of a long road trip and had pre-downloaded many hours were of stuff to listen to because I didn't have much data in my plan. All of the episodes I had downloaded were gone. Additionally because I was driving, learning a completely new interface was horribly dangerous.

That was the day I disabled auto updates, and now I manually approve each one. Certain apps where I don't want to risk UI changes or new bugs, don't get updated right away. When they do, I always backup the old APK first so I can easily restore it if needed.