@SHOW_ME_YOUR_ASSHOLE Whoever invents pavement-friendly mousses will be a zillionaire for sure.
But for what it’s worth I did use UHD tubes on a 1400 mile Baja ride earlier this year from the US to La Paz (~80% off-road through the cholla and cactus 🌵) and didn’t have any tire issues whatsoever. And I was riding a fully-loaded Giant Loop Coyote (~40 lbs) on a CRF450X, hitting some crazy trails, including some of the Baja 1000 course. UHDs did much better than I thought they would.