Originally Posted by
Polaris OBark
It is the fragility of the derailleurs that worries me a bit. I have 11-speed and hydraulic discs, which always seems to get a reaction from people.
As far as I know 12-speed derailleurs aren't more fragile than others. They were first introduced in the mountain bike world, which is much harsher on derailleurs than other disciplines.
I've personally never wrecked a rear derailleur but have broken two front derailleurs, both 11-speed, one from Shimano and one from Sram.
As far as UDH goes, there's no reason for touring bikes to adopt it. But there's really no downside to having it either. It'll eventually make it to road and gravel frames because Sram already has spec sheets for a drop bar version of their Transmission.