Smart bulbs.

You can make your artificial sunrise take as long as you want, and connect them to a sleep tracker so they're timed to wake you up during a comfortable phase.

I've been doing this for 12 years, and I don't think I have ever been upset to hear my alarm since, as long as I'm home and the lights have prepared me. Lately I've even been waking up before my alarm about half the time, even though I work on a schedule one time zone east of where I am.

It's shocking to me that it's not more popular for everybody. I guess the benefit is hard to explain.