Most wired-on tires have thicker treads, and are less vulnerable to the types of small shards and flints that tire savers best defend against. Flats are less expensive, and simpler to repair than with tubulars, plus other options exist, such as slime, and Mr. Tuffys.

I'm an easterner so the goathead issue doesn't exist for me, here the enemy is broken glass. Also the move to PVC soda bottles, combined with deposit laws has done an amazing job reducing the amount of glass on urban and suburban laws. In the case of deposit laws, it's a rare example of a regulation that actually did what it was supposed to.