Unfortunately, Google no longer recognizes this as a valid development strategy. If you want to publish on Google Play, you need to continuously release updates targeting an SDK released within the past year[0]. If you don't, they will send you constant warnings about how your app is violating their policies, they might derank your app, and eventually they'll stop making your app available to new users.
Updating the SDK is not that simple and it often introduces new bugs if you don't read through the full changelog and test thoroughly. I have 3 apps and it already feels like I spend too much time each year updating SDK, I can't imagine updating 30.
They talk about how this somehow improves security and enhances user experience, meanwhile this policy worsens user experience by pushing people towards ad-filled apps that have the resources and courage to release needless updates, and they still publish spyware on their store.
[0] https://developer.android.com/google/play/requirements/targe...