Even if a plug does fail, is it any worse than having the misfortune of getting another flat?
Some riders think getting a flat on a plugged tire is fatal - I don't get it.
Well the thing is when you get a nail or similar object puncture and you plug it, you have to ream out the hole much much larger to install the plug. And I believe the reasoning is that if the plug falls out, your going to get a fast deflation similar to a blow out...Not a slow leak due to nail or similar object that is much smaller and is still stuck in the tire partially plugging the hole itself...