Completely ignoring the cogent part, "How about the wee fact that data is continually changing the format that is is written in, and on. Do those backups also store the OS's, and Apps used to create the data? " Try again.
Explain how exactly that matters?
Why does it matter what kind of media a TIF or JPG is written on, as long as it can be copied to other media when the time comes?
Why does the backup have to store the program the TIF or JPG was created with, as long as other programs can read the files?
Why does the backup have to store the OS, as long as other OS's can read the data?
This ain't the wild west of the very early days of computer systems, where we might need to get our hands on an Altair to read the files that were written by one. Do you really think that suddenly overnight, no browsers will be able to read JPGs anymore? Do you really think that suddenly overnight, no programs will be able to read RAW files anymore? Or TIFs, or PNGs, or any other common image format?
Be serious for a moment and explain why we should panic about how we might all lose our digital images per your warnings. Spell out a realistic scenario.