Makes sense. Thanks. Then I’m glad I’m using it! I fell into the arch wiki black hole and an hour later had pi hole, DoH and OpenVPN all configured so all my devices including my iPhone go through my home internet and the pi hole. Pretty neat. No ads while mobile. I did have to do tcp on 443 since udp and t mobile did not play nice together. I was too lazy to debug that though.
That fact will make it very difficult to resolve hostname to ip address for anyone behind a CDN. That is the reason Comcast is fighting it.