Having to fix unsealable flats on my commute has been a monumental pain several times but I've had countless times when I've arrived at work and noticed a new puncture that I hadn't even realised happened and that would have been a lot more times changing tubes in the rain that I avoided.
I've always wondered if this is as true as we think though - would every small hole that gets through an outer tyre necessarily pierce the inner tube, or would the tube sometimes deflect + not puncture?
Having to fix unsealable flats on my commute has been a monumental pain several times but I've had countless times when I've arrived at work and noticed a new puncture that I hadn't even realised happened and that would have been a lot more times changing tubes in the rain that I avoided.