If nothing else, film will become the province of large format, which cameras can be (and are) made on a boutique basis, and do not require any degree of sophisticated automation (or even mechanization) in order to function. It would in some ways necessitate the return of very slow emulsions, which are in fact easier to home-brew on glass plates. And goodness knows large format cameras can last forever - I have one that is almost 140 years old, and when I get a new bellows on it, will be functional. I have lenses made in the 1860s that work just fine. I know some wet plate and daguerreotype folks who are shooting with cameras that predate the US Civil War. So if you want to keep doing analog photography, there are always ways to keep doing it - the only obstacle is your level of commitment and need for automation.