C'mon, a lot of that is readily available. I still have a perf
tape reader, and recently disposed of a working 8-track player.
The card readers went out years ago, but you can physically
read cards by looking at them! Still need to read 8" or
5.25" odd format floppies? I'll sell you a Compaticard disk
controller, the drives, and Uniform software to do it.
8mm and 16mm movie projectors show up at garage sales all the
time. If you don't have a Beta VCR (I have 3) there are
services that will transfer the tapes to another format for you.

I'd avoid using something completely proprietary for long term
storage. But you can still get 7 and 9 track computer tapes
read if you want. Odds are pretty good that you'll be able to
read standard CD's and DVD's in 50 years if the media don't
deteriorate significantly.

I'm a single individual and I can handle the majority of the
"obsolete" formats you've listed!

Emmo wrote:
The problem with long term media storage is not deterioration but lack of
playback hardware. I have lots of media from a mere 25 years ago that
cannot be read, not because of deterioration but because no hardware is
available. Try to find a punch card reader, a paper tape reader, a Sony
PortaPak reel-to-reel video player, a Beta video player, a video disk
player, a Polaroid film projector, an 8-track tape player, an 8 inch drive,
a single-sided 5 1/4" Apple II drive, a CP/M single density Osborne drive,
any number of tape drives, and so on.