not arguing that indeed there may indeed be a finite service life, the critical question is was at the time of the original sale a definition of “lifetime”? And of course, was it communicated in writing?

I have had good luck with minor products, a Cygnolite (sp) headlight had its switch cover go AWOL, I emailed to purchase a new pliable switch cover. They sent a service part straightaway gratis.

big ticket items are a problem especially with small firms. I see both sides, they may not have the capital reserves to support all the potential claims. It does and should give a consumer pause regarding a purchase.