For me it boils down to a few different factors. And understandably everyone's situation is going to be slightly different. For me:
1. I generally like to get to my wheeling destination area (Moab or Sand Hollow for example) and offload from the trailer and not get back on it until it's time to go home. It's nice to just drive to the trail head and not deal with a tow rig....but much of my normal group doesn't have tow rigs. I'm sure this influences this point for me.
2. The times I do run stickies, I die a little on the inside when I drive them around on the road....like
@Hickey said...
3. I've been wildly impressed with my KM3s. Maybe not on the size of the tire, but the performance is quite good. There have been places where they have worked just as good as my old sticky creepy crawlers or my KR3s.
4. Cost. Let's be honest. Big tires are expensive. A DOT big tire is a lot cheaper than a sticky big tire. And the DOT tire will last longer. Regardless of street/trail mileage mix.
It would be interesting to see a 1:1 tire comparison with stickies vs DOT on the same rig on the same obstacle on the same day. Maybe
@Hickey and i need to go hit an obstacle like you gotta be nuts, then swap tires and do it again.