Yeah like everything else must have a turn over . Have a few Old Pioneers and a Solo all have metal switches and have not became inoperative within 30 + Yrs. Those were the Days. Both my New Husky's have the Plastic Switches , so far all ok within a little over a yrs use. I will have to check with my Son's 460 and see if he indicates any problems. I did not hear of any lifetime warrant on the Ignition switches . I will have to follow up on that one , unless Spike can quantify ?