the Internet Archive is a wonderful, valuable, massive, messy, complicated Single Point of Failure for institutional and cultural memory.
There are things that exist only in the archive and nowhere else.
This is, in a word, Bad!
I love (most of) the internet archive, what it tries to represent, what it does, the fact that it exists to push the envelope on what is legally permissible for a library and archive in the modern age (and it wins about as often as it loses, and that's also good.)
But it is fragile in more ways than are obvious.