There is enough of a supply of high quality manual film cameras around today that even if they never made another one they'll be plenty around for anyone who wants to use one. I'm giving my Leica M6 Millennium to one of my daughters (the one who thinks the manual everything is way cool compared to the autoeverything cameras) in the event I don't make it to 104. I have no doubt that she will be able to obtain B&W film and plenty of spare parts and service if she wants/needs them. View cameras can last forever. None of this should be an issue.

If they solve the dynamic range issue with digital sensors by then, I'd use one for color.
Take care,