I have two Windows 2003 SP1 domain controllers running DNS. They are both setup to forward DNS queries to a Linux box in the DMZ, and then failing that to go direct to our ISPs DNS ...
It's an upgrade worth making, but it comes down to your privacy concerns.
I'm running PiHole at home for ad-blocking, and I'm using Cloudflare as the upstream server. PiHole have a description here of how to add Unbound to the system as a recursive DNS resolver, with the ...