Arizona doesn't observe DST and hasn't since 1968. It works great, and the rest of the country should follow suit, IMO. We're no longer a nation of farmers whose work depends on daylight.
It was always about saving fuel during wartime. Farmers dislike DST.
Notwithstanding, I am pleased we have daylight savings. It makes me happy and seems like an appropriate and proportionate response to the variation in length of the day.