It's really frustrating with app stores and auto-updating apps. I've got an ereader running an older Android operating system, and it's difficult trying to keep versions of apps that work on it to stay the same and not brick themselves. It's a little sketchy having to track down and sideload the right older appk package that still works.

I wish it was more like Nuget, where you can select the version you want and have to explicitly upgrade, with an easy downgrade option.