Yup. At my last job, we designed our products (medical instruments) for a service life of 15 years and a market lifetime of 25. i.e., from the time the product

Yup. At my last job, we designed our products (medical instruments) for a service life of 15 years and a market lifetime of 25. i.e., from the time the product was released to the market, you could expect Service and Support and spare parts to be available for at least 25 years and the device itself was expected to last 15 years in the field. Of course, I'm talking about large machines that cost between $500k - $1M each, so...