NB. I don't use Windows and I don't use "Private DNS". I'm referring to using HTTP/1.1 pipelining^1 with a TCP client plus TLS forward proxy or HTTP/2 with an ldns-based client to fetch DNS data in bulk, outside the browser, from the command line. I got some incredible speeds from Mullvad

1. Not every service still supports 1.1, RFC recommends H2