The loos of the *physical* media is not so much troubling as is the loss
of web content. As companies go out of business the content evaporates.
The Wayback Machine helps a bit, bot think of all of the ftp content
(which isn't preserved by
archive.org) that has just plain evaporated.
I would guess that the volume of this might even be larger now than the
stuff archived on old magtape.
Of all the bookmarks I have in my browser accumulated over the last 7 or
8 years, at least half of them are dead links.
--Chuck