It would probably last 20 years if kept in the garage and never used. It is a tool, and a good tool, but like all tools they are meant to be used. If taken care of properly, you will get your moneys worth, if it only lasts 5 years. YMMV
UDS, cheap o grill, rusted chimney, yeller wannabe thermo pen, Maverick ET 732, 1950 model wife.