Even desktop OS don't go far enough. Would be nice if Windows and macOS came with a top 5 {mem,cpu} consumers drop-down in the global menu bar without having to install a tool or open task manager. We complain about bloated apps but without providing insights to the user, there's no pressure for apps to optimize.
If it seems like too much of a power-user feature, how about your run-tracking app silently closing on a long run because you were also listening to Spotify in the foreground? That's not a good experience. With no insights, all you have to act on is superstition. Do I need to find a run-tracker that doesn't crash or should I try a different music player? No data so who knows.
We still insulate users from this data for some reason even on mobile devices that LRU-close apps when memory is tight. Let the people know, dammit.
An app can already say 'I'm still doing a user visible action' (like logging a run, or playing music). Whenever one of those apps has to be killed to free up memory, a messagebox should be displayed saying "Spotify has quit due to low memory. Spotify was using 647MB and RunGPS was using 1454MB out of 3000MB system memory".
Google won't do much against it because the worst of the data hoarders are the f2p games that make money for themselves by selling the user data they can get their hands on and make also a lot of money for Google via all the IAP commissions.