So when you are out riding, do you carry an extra tube, in case of a blowout, just to be prepared? Or if the tube is installed correctly, do you think the likelihood of a blow out would be no more than with a 36er tube?
For me, similar to the clipless thing, I would probably be worried about something going wrong, so I would probably want to carry an extra tube, at least until I was convinced that it was as dependable as a 36er tube, under the same conditions. 
I’m sure there are as many or more people who have not had this problem. Can give one pause though, and wonder if the weight savings are worth the risk, if there really is one at all.