[tjarratt]

I'm a little surprised that there wasn't a valid google cache still kicking around for any of those dead links.

[Dylan16807]

Google often rapidly removes cache links for dead pages even though they're still indexed. Sometimes it takes weeks, sometimes it takes minutes.

[borism]

Google is for-profit organization. They're not interested in keeping stuff unless it makes them money.

[quizbiz]

Making money is not the only goal of a for profit organization. Being public certainly doesn't help but if "don't be evil" is still ingrained in Google's culture, I would expect them to support archive.org's effort.