We have the technical ability, but it's not easy. We wouldn't do it without Roko's and Eliezer's consent, and a lot of support for the idea. (I wouldn't expect Eliezer to consent to restoring the last couple of days of posts/comments, but we could restore everything else.)
Surely it would be easy to restore just Roko's posts, leaving his comments dead.
Also, if you don't end up restoring them, it's rather awkward that he's in the top contributors list, with a practically dead link.
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