Keeping software hosted is active. Let's say he waited until his domain name expired... then he could say "I'm not spending the $10" and let it go offline, and people would excoriate him then. He just chose to rip the Band-Aid off at once instead of in bits and pieces.
I think, if he's posted up and said 'hey, I'm fed up with this internet thing. I'm taking everything down, can someone else host them', there'd have been a queue. Certainly, I'd have been very glad to host the Poignant Guide
I understand that you're referring to the web-based version which has a different feel to it, but the content does still exist. Nothing lasts forever--enjoy it while you can.
They were hosted free on github and/or rubyforge. He had to go in and actively delete them. If he had done nothing, they would still be there right now and there wouldn't be all this kerfuffle.
AFAIK there are forks/mirrors of his work on GitHub; so why are you having such a hard time dealing with his repos being deleted by him? It sounds like you're just whining.