I have been running since 1978 and started out with New Balance because at the time they were the only company that I knew of that made wide widths. I wear 4E.  I love the 990 models and will continue with them. Very nice cushion at the heel and alot of toe room. The outside material wears "average".  For me, the first thing that happens is my big toe will start coming through but I would say that is due from "normal wear".

 I used to run 40 miles a week in my younger years and now only 20. I buy new shoes about every about 2-3 years as I have two pair. I think it is good to switch off especially if they get wet in the rain.

**Use a shoehorn to keep the upper back of the shoe from wearing out inside at the heel.

" Have a good running day"