It's not just the COST of a full sole replacement on good shoes that Topy or Vibram allows you to sidestep. It's that a resoled shoe will not feel exactly the same as it did with its original sole. Sometimes it will feel very different, to the point of being no longer wearable. I have a pair of shell cordovans in which I have walked literally ten or twelve thousand miles over fourteen years. They have never been torn apart to be resoled. I have changed the Vibram sole protectors counteless times. The weight and balance of the shoes has never been compromised. Left in their JR-leather-soled original condition they would have required five or six resoles by now and would probably be finished. As it is, I am looking forward to another fourteen years with them. I've also put sole protectors on bespoke Lobbs for the same reason (and because with those cost of resoling is very high as well). No one sees or cares how the bottoms of your shoes look, unless, as noted above, they have holes in them.