I've gone wider and wider over the years. I started out on 23s, then rode 25s for years. Now I'm up to 30mm GP5k tubeless on my "endurance" ride and 28mm GP5k with TPU tubes in my weight-weenie climbing bike. We've got a lot of chip seal, potholes, cracks, and roads with expansion joints in them. The bike with the 30mm tires is considerably more comfortable, I don't plan on ever going back to 25s.
What was really eye opening for me, was when I set my gravel bike up with some very efficient 42mm tires. These are meant as a gravel "racing" tire and have less measured rolling resistance than many road tires. Comparing wattage and segment times, it's surprising how close the gravel bike is to the road bikes on road segments. Makes me even consider upsizing my 30s to 32s next time I have to get new tires.