That's one thing, sure, but that doesn't affect the majority of sites. CF's DNS POPs are likely more dense than the great majority of service providers POPs. So using the subnet of the resolver is about as good (if not better) than having ECS info for practical purposes. (Because the client is normally going to hit the closest DNS POP to them in BGP network distance.)

I'm not a CF fanboi, in fact I think they are evil. But let's not make weak arguments. That said, yeah suppression of ECS info is a deliberate anti-competitive choice by CF. They probably have convinced themselves its about privacy, but it isn't.

The real benefit to them is, as the CDN, they get the benefit of even lower latency and even better control. With a penalty to everyone else.

It's a disgusting arrangement, and a net loss in privacy. Your ISP already knows what websites you visit, they don't need the DNS because they see the actual traffic.

I'd find it more palatable if these so-called TRR providers were required to be DNS-only. Maybe DNS + registrar.