I read somewhere that Chrome will be adding DoH (DNS over HTTPS) and I'm not sure if it's some experimental flag you toggle. I imagine they will be using 8.8.8.8 (which supports DoH). So now you are sending all your personal data to Google instead of Cloudflare :o But you can always use another DoH provider if you dislike Google or Cloudflare[0]
I imagine any browser worth its salt will eventually switch over to DoH as the default as time goes on, as it's a great feature even though it doesn't honor the /hosts file or honor pi-hole[1] configured routers, it's still a great feature to have.
> I imagine they will be using 8.8.8.8 [...] now you are sending all your personal data to Google
You shouldn't guess/imagine something and then build your opinion on it. IIRC, Chrome will continue to use your configured nameservers and only use DoH if it's in a whitelist of known implementers.
Since you can configure which DoH server your browser uses, I would guess Pi-Hole is going to implement (or already has) a DoH server of its own that will use configurable upstream DoH.
I imagine any browser worth its salt will eventually switch over to DoH as the default as time goes on, as it's a great feature even though it doesn't honor the /hosts file or honor pi-hole[1] configured routers, it's still a great feature to have.
[0] https://github.com/curl/curl/wiki/DNS-over-HTTPS
[1] https://pi-hole.net/