I agree. In my experience with systemd-resolvd, things happen that make it _believe_ there is no DNS configured, and you end up with something incomprehensible

I agree. In my experience with systemd-resolvd, things happen that make it _believe_ there is no DNS configured, and you end up with something incomprehensible (a "hidden default" or some such). Please let it just fail so that one at least has a chance of understanding what's happening rather than some magic. Typical systemd rationalization, imho: "should anything be perceived as wrong, perform hidden magic."