Cloudflare's argument's are all based around ANY making it slightly harder for them to make a profit. A small chance of DNS amplification attacks in DNS is what Cloudflare thinks about because it's their business. But there's no reason to believe this is more important than individual users wishing to see what servers are behind a domain.
Combined with GDPR killing off whois the internet is a much more boring, less transparent place.
(B) You are free to run ANY as you like on your domain. For domains you own, this RFC doesn't change anything.
(C) Would you advocate for responding to AXFR / zone transfers? There generally is consensus that allowing enumeration is not desired.
Since most servers are web servers these days, you can get pretty close to this goal from certificate transparency logs.
This was proposed solution, the problem is that in case of attack, against a valid Authoritative service, launched via open resolvers, the open resolvers would just download Gigabits of ANY traffic with TCP. Read about this here: https://fanf.livejournal.com/140566.html
None of your business, really.
> Combined with GDPR killing off whois the internet is a much more boring, less transparent place.
Thank lord for that, there's literally no benefit from it, with WHOIS evil still did evil and normal users got their privacy violated, without WHOIS evil can still do evil and normal users' privacy is protected.
Cloudflare once again pushes for broad changes to the way the net operates that benefits themselves and other centralized corporate players without any benefit to individuals that actually use the net in the sense of using the internet and not just a web browser.
The kind of exploration and direct learning that was possible when I was a kid growing up 90s/00s is slowly being phased out as the money seeps in.