Killing apps is a good thing . There have been battery saver programs since the very beginning of early Android versions to kill of connectivity and clean up running apps. When Android now supports some of that natively and vendors too, even more aggressively, this is just responding to users' needs. There is a quite clear usage pattern to support this behaviour: unless I explicitly say so, I don't want apps on their…
Hell there are comments in this thread testifying that these built-in "battery savers" even kill the built-in alarm application.