[darklajid]

I might have misread the GP, but I kinda felt that it also brought up the issue that a pihole (or similar solutions) might cease to work in a "DoH / I automatically pick the best resolver if I deem yours not good enough" world.

DNS privacy is awesome. Filtering malicious and annoying (read: ads) content at the DNS level is mandatory for me..

[kccqzy]

I don't think how that would cease to work. At least in the case of Mozilla they try to detect if you have a custom DNS server. When found, they won't use DoH for fear of breaking many intranets in enterprises.