"Who's gonna preserve that stuff?" There are dedicated groups attempting to do what they can, getting the word out so that more eyes can scan the landscape and sight historical ephemera to be preserved helps too:

http://www.computerhistory.org/groups/spg/ https://archive.org/details/software

My list which has many items still to be found:

http://www.retrocomputingtasmania.com/home/projects/spg