Most of the privacy concerns seem related to the reduced ability of countries and employers to control the browsing behavior of people. IMHO this is mostly a good thing. I don't want to inform my government or employer of every website I visit. Lack of their ability to do this is the whole point of DOH. It's a feature not a bug. It's the reason I enabled it in my browser: it improves my privacy and security.
Whichever dns provider I choose to trust. So definitely not any DNS server operated by O2 (my provider). Aside from being slow; they hijack the dns erros for ads. Also, I simply don't trust them to do the right thing.
Most of the privacy concerns seem related to the reduced ability of countries and employers to control the browsing behavior of people. IMHO this is mostly a good thing. I don't want to inform my government or employer of every website I visit. Lack of their ability to do this is the whole point of DOH. It's a feature not a bug. It's the reason I enabled it in my browser: it improves my privacy and security.