WHY DO MEN STOP BEING FASHIONABLE?

      There was a gentleman in the grocery store recently who was wearing a colorful checked sweater and a white golf shirt with the rounded collar showing. This was a popular look for the well dressed man way back in the 1970's or 1980's or at least long ago. 

       My question is when does a man that has always been "well dressed" suddenly losses interest and continues to wear the same outfits that eventually becomes outdated. What happens? Do we just give up somewhere along the way? Or do we assume a certain look will be good for eternity?