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Not exactly a ringing endorsement is it.
I've not had particular trouble with thorns. Are tyres like the Byways less puncture resistant than older equivalent/similar non-tubeless tires, because they are expecting most people to run them tubeless?
Not one single puncture yet on my aged Clement USH, plenty of commuting as well as 'gravel'.
lemonade-
I'm not really bothered. Run whatever works for you. I've finished multiple TCRs with gravel sections, rough roads, yada yada with tubed tyres and zero flats. Doesn't mean TL isn't a good idea for things like my MTB rides. If what YOU are riding is giving no issues with tubes, then moving to TL seems pointless.
TL tyres often have thicker/stronger sidewalls than their equivalent tubed versions.
TL are more faff to setup but less faff in use. If you're the guy constantly pinch flatting on rocky, stabby rides then you might be told to run TL or find another group.
hippy
For gravel and MTB with high volume tyres and low pressures, once you have them setup and working, they're pretty neat, especially if you're riding somewhere thorny. I still wouldn't bother for road.