Longevity-wise, https://squirrelinhell.blogspot.com/ should be up indefinitely since AFAIK, Blogspot/Blogger has no nasty deletion policies (although I have not checked specifically, they are one of the oldest blog hosts on the Internet, and apparently they are considered safe from Google axing because they are used internally so much for Google official posting). http://bewelltuned.com/ seems to duplicate a lot of the content, and the copyright date suggests most of it has been there for at least several years, and it looks easily crawled, so it should be well-archived.
Previous discussion: https://www.lesswrong.com/posts/hGtBH7SJy6Y2SmAj6/tune-your-cognitive-strategies
Longevity-wise, https://squirrelinhell.blogspot.com/ should be up indefinitely since AFAIK, Blogspot/Blogger has no nasty deletion policies (although I have not checked specifically, they are one of the oldest blog hosts on the Internet, and apparently they are considered safe from Google axing because they are used internally so much for Google official posting). http://bewelltuned.com/ seems to duplicate a lot of the content, and the copyright date suggests most of it has been there for at least several years, and it looks easily crawled, so it should be well-archived.