Most of interesting features aren’t (can’t) be in the support libraries. I haven’t developed android apps in years — thankfully — but the features I can recall

Most of interesting features aren’t (can’t) be in the support libraries. I haven’t developed android apps in years — thankfully — but the features I can recall off the top of my head are runtime permissions and granular notification settings. Both sweet things that weren’t worth implementing for years after the OS official release.