See, that I can do just fine. I haven't heard an alarm clock in decades. Even if I have to wake up at like 4 AM for an early flight I will typically just wake up 30 minutes earlier and check the time. I still set an alarm just in case, but I can just... wake up at the same hour every day naturally (even before sunrise) and fairly reliably early at unusual times.

But falling asleep on command? That's science fiction.

When I worked nights I actually ended up having to create some buffer time before falling asleep. Otherwise it was all work-related nightmares every time, all the time. Sure, I was working from home as well, so people who commute back from their night jobs may get that for free, but still.