> Dear Cloudflare, please turn on ECS by default.

Cloudflare has made it clear that they won't. From https://developers.cloudflare.com/1.1.1.1/nitty-gritty-detai... ,

> 1.1.1.1 is a privacy centric resolver so it does not send any client IP information and does not send the EDNS Client Subnet Header to authoritative servers

Yeah I quoted that in the post. Regardless, I make the case for EDNS Client Subnet