If you don't have a tight power budget hosting a 'whole OS' isn't crazy (though it doesn't mean it isn't wasteful). Most chips will use an RTOS for the timing

If you don't have a tight power budget hosting a 'whole OS' isn't crazy (though it doesn't mean it isn't wasteful). Most chips will use an RTOS for the timing guarantees, and they generally provide better power resilience than other OS's.