I have drop in LED replacement bulbs in my ‘15 F150 because the factory halogen headlight were awful. I sometimes wondered if they were on. I did adjust the lights down as far as they go, and I’ve only been flashed once in two years.
I think that there are just so many bright OE and aftermarket lights on the road that people are desensitized to bright headlights. I’ve learned to avert my eyes to the right, but as I’ve aged, the bright oncoming lights do effect me more than they used to.
The next generation of factory LED’s are going to be incredible. I’ve seen Audi has a headlight that brightens around other traffic. The scariest part is the replacement cost. Insurance costs will go up and more cars will get totaled just from headlight capsule replacement costs.
I do feel day time time running lights are a useful feature. With factory halogen headlight the DRL’s are pulse width modulated to about 60% of full brightness. Drop in aftermarket LED’s, on mostly Japanese cars, turn this modulation into a noticeable strobe which annoys and distracts me.