UDH was a great idea but it was also a trojan horse for SRAM's new proprietary thru axle system. It always was. (2019 articles on 2018 patent)
SRAM's universal hanger concept could make coaxial mounted (hangerless) derailleurs a thing (again) - Bikerumor
SRAM Coaxial | Peter Verdone Designs
Knowing the bike industry, there will be a separate incompatible version for roadies at twice the price with some guff about how it's grams lighter and it will be the only kind that integrates their new brake caliper, or something
For bike makers it's a trap. UDH is an adapter from proprietary SRAM coax to the old classic Campy hanger that has been the default for 50 years. Do you make your bike SRAM coax compatible or not? Can you use the latest SRAM group if you don't? But then does Shimano want to sell you DA parts that you are going to bolt to a SRAM adapter? To be fair Shimano tried the same thing ten years ago but it was at the same instant that SRAM 1x11 ate their lunch and it never caught on