It would be great on weekends to be able to have the alarm ring after 8ish hours of sleep, regardless of when I go to bed. SaA would detect the initial sleep time, it would detect the amount of sleep through the night (i.e. subtract awake periods) and ring an alarm between 8 and 8.5 hours using an ideal wakeup.
My Garmin wearable automatically detects sleep so with a wearable integration a “set once” option is feasible.
