I believe it's unfair and insensitive to the author to point to the archived site exactly after the site was obviously modified not to have the linked archived content. Ditto for the other commenter that writes the name of the author even if the name was obviously intentionally omitted from the present site.

The author obviously wanted to present the material without the background the the mentioned commenters here introduced back.

I know we can never expect that the archived content disappears, but we can at least attempt to respect in my opinion reasonable motives of author by concentrating on what's on the site now.