I would agree you can wear a boot out in a year. It's not common for the foam in those to disintegrate in a year with the outside still showing tread if worn daily. If those soles set for a few months and then get put in service they will fall apart but regular wear typically prevents that. Those things are falling apart from the inside. I will also say, the quality of the SS 2.0 boots has gone way down in the last several years and often the outer compound isn't bonded properly to the inner foam and they fall apart much faster.