I almost forgot, another benefit is being able to change out the switches to something more useful, like a count-down timer, for the bathroom fan, or astronomical timer, for exterior lighting, as well as a wide variety of fan/light combos and dimmers.
One of my outside, light sensing sconces wouldn't go off during the day. It stayed on 24/7. I was going to change out the sconce, but I couldn't find it. Finally, I installed an astronomical timer in the Decora switch box. I put in my latitude/longitude and the current date, and they automatically go on/off w/ sunset and sundown. So now, when I replace those lights, I'll get what I want, instead of only ones w/ a bulky light sensor attached.
Q
transoms
Q