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It's not clear cut. Tubeless is good, very rarely fails but if it does, it fails badly.
I had a bad puncture last year which screwed up one of my tubeless tyres before I left Belgium. Had to buy a non-tubeless tyre and then got a couple of punctures in it. Some others had issues, some others didn't. Some people with tubes had issues, some got there with no punctures.
If I did TCR again I would most likely use them but I wouldn't feel too strongly about it.
tubeless setup for the TCR - worth it?