Not excusing this malicious behavior, but I have to say, the mentioned blog post is a major dick move, too. Got quite the impression of a passive aggressive undertone, and there is clearly bittersweet irony in collecting and "archiving" an archiver's personal information from long ago traces. Maybe it's all some feud between two dicks, some backstory untold. Maybe the blog author wanted some information gone from archive.today, but was denied.
Perhaps, and yet I've referenced this article numerous times over the years. The most important property of an archive is that it saves an authentic copy of the source material—that is to say, the archive must be trusted. If archive.today is indeed a legitimate archival source first and foremost as it purports to be, the user has a reasonable interest in investigating the people behind it so that they can come to an informed conclusion about if they can trust the archive or not.
Blog post author here. Nope, I was just curious, since it's quite remarkable how huge archive.today is, how widely it's used, and how little we know about it. I do acknowledge the irony of an archiver being upset by an archive of their own work though :)
All that said, the post does not actually dox anyone (as far as I can tell, every name mentioned is an alias or red herring), and the "investigation" was basically punching things into my favorite search engine and seeing what came up. If a nation state level threat actor or even one of the copyright cabals wanted to find the maintainer, they have much better ways of going about it.