Jani here. What you describe as "doxxing" consisted of a) a whois lookup for archive.is and b) linking to a StackExchange post from 2020 called "Who owns archive.today" [1]. There is literally no new information about the site's owner in the post, all names have been dug up before and are clearly aliases, and the post states as much.
Gyrovague here. As linked in the blog entry, you can view both sides of the email correspondence here: https://pastes.io/correspond
As for outcomes, I'm very much a bit player/spectator in this drama, nobody's going to be "taking them down" over DDOSing an obscure nerd blog.
If they do go down, it'll be the FBI or equivalent, and it will be publicly justified as some combination of "protecting the children" (cf. WAAD) and/or copyright violations.
[1] https://webapps.stackexchange.com/questions/145817/who-owns-...