To avoid having to activate heart rate monitoring 24/7, wouldn’t it be interesting to be able to manually trigger a sleep monitoring phase? Example: I go to bed at 11 p.m., I go to the sleep menu and trigger “Start sleep tracking” and the watch knows that it can activate HR to track sleep. The same goes for naps which are sometimes not well detected otherwise. It would also preserve the battery by not tracking heart rate all day if the only use is for sleep tracking.