I have 4 pairs of Allen Edmonds shoes. The oldest pair is 6 or 7 years old. With some light care (conditioning / polishing) they've held up very well. To address another comment about comfort: They're quite uncomfortable at first. Over time the leather (and cork insoles) mold to your foot. Making them comfortable.

These are leather dress shoes though. As far as I know, this doesn't exist in the athletic shoe world. Considering the materials used in athletic shoes, I don't know how a "repairable" athletic shoe could exist without some serious re-engineering.