Am curious about this also...
Planning a Road+ build with carbon parts for weight / comfort over 10-20 hour rides. Riding would mostly be roads, less maintained roads, gravel, etc.. nothing too rough.
Been looking at the Nextie stuff. Looks pretty promising, and I can't imagine they'd just "break" unless bouncing off of baby head rocks etc.
https://www.nextie.com/premium-lite-...nch-NXT27XM30U