Earlier quoted context omitted.
We're not discussing IP addresses, we are discussing whether their logs can leak your secret domain name.
Thats more clear, I get your point now. Again, though, that's not how most people would read the original comment. I've never even contemplated that I might generate some hostnames existence of which might be considered sensitive. It seems like a terrible idea to begin with, as I'm sure there are other avenues for those "secret" domains to be leaked. Perhaps name your secret VMs vm1, vm2, ..., instead of . But yeah,…
I use Google DNS because I feel it suits my personal theory of privacy threats. Among the various public DNS resolver services, I feel that they have the best technical defenses agains insider snooping and outside hackers infiltrating their systems, and I am unperturbed about their permanent logs. I also don't care about Quad9's logs, except to the extent that it seems inconsistent with the privacy story they are selling. I used Quad9 as my resolver of last resort in my config. I doubt any queries actually go there in practice.