For the last week or so, I was unable to use archive.is (or any of their variants). I figured it was a site issue, or maybe they'd gotten in trouble because of their issues with adding links to posts (which might actually be the overall impetus).
Turns out that Eero's "advanced security" feature was blocking them.
I've got more than enough security features on my computer and browser that I don't need my mesh router being "helpful" like this. Figured I'd note it in case others have had similar issues.
Also see: #1283458 - some fake french association has been reaching out to every blocklist and some of them got through. None of the arcive.is|ph|today domains resolve for me when I have DNS guardrails up, so I just use tor over socks5h for it now.