Can't you argue the inverse as well? Cloudflare isn't sending EDNS Client Subnet to any other authoritative name servers, is anyone else having problems? Or are 99% of people working just fine without this optional EDNS information? So isn't it archive.is who is the 1% who isn't following the standard configuration? Which is to still resolve correctly even without the option EDNS information? Sure, it might not be the best possible answer for a client, but you can still return an answer?