It looks really nice for being from 1999. It looks like the sole is just beginning to get worn. I have that model in size 12.5UK or 13.5US, when they still made half sizes. Also have a few 8287 boots. Three MIE and one MIC. But I like the model shown in OP better. It's harder to get snow and rain into it while 8287 is more susceptible to that. They do take forever to wear out. A decade is not unreasonable. Depending on how often you wear it and rotation. The local cobbler refused to resole a pair but that's OK since it lasts a long time anyway.