I have an app that I released a couple years ago (plus another legacy app that I maintain for one of my company’s clients). My game has a long-ish title, but it was fine until some asshat at Google decides that 33 characters is too long. On top of that, every time I’m forced to update the target SDK, I need to spend several hours figuring out a bunch of new build errors. This is not how I wanted to spend my vacation time.
With arbitrary metric, I mean that Google doesn’t detect whether you’re actually using deprecated APIs, they just detect that you’ve declared to be targeting Android API version 27 and that 27 is smaller than 31. Especially with smaller apps, you may have to go through the whole release process just to increment that number, with no actual code changes.
Another rather arbitrary metric is how often and quickly they want to deprecate APIs. In other ecosystems, you update your app to fix security issues or because you’re developing new features. On Android, you often end up updating, because your Googly overlord demands an update.