I got this idea from MazdaTirol who said his tire is expiring.
But because of moderators, lately Grim Reaper not enforcing for sale rules, the info is deleted

The attached pic is a pic of my tire after 2-3 years. All 4 were replaced under pro-rated warranty with a different model. They were all season, went to summer/rain tires and separate winter. The all seasons were only good for 1 year in winter and really not that great.