What a great, thorough response, Bob. We are not even working with automobiles or 16mm film equipment that functioned with regular maintenance for decades. Even software that has no physical embodiment and can run flawlessly forever will fail when it runs up against a new computer operating system. What a system! At least we can keep current systems running for a few years at a time, thought the electronic companies will try to sell us new versions every few months. They change even faster than fashion seasons. Films/videos/shows/programs are as ephemeral as people.