>>2684927>its not that the shoes fall apart.Depends on the shoe and the terrain.
I wore a pair of Salomon trailrunners on my last trip to Nepal. They were pretty much new at the start of the trip and literally falling apart by the end of it. That was only 6 weeks, hiking 3-10 hours daily.
What killed them was the terrain, lots of scrambling over jagged boulders that put a lot of lateral or rotational force on the shoes causing the upper to tear away from the sole along the sides.
I'm still glad I chose them, the reduced weight vs boots was definitely worth the money given the amount of elevation change we were dealing with each day, but durability is a legitimate downside to trail runners.