oh, I didn’t miss any of it (old new dawg here). I have no problem using Proxy for news (I can tell you stories) but some station get uppity about it. If they want to broadcast 1920, giving them 1440 h-dv won’t cut it. And rendering out at the end is a time killer. ProRes, proxy, LT, whichever.
Whenever someone would use the term “broadcast quality” my response was “you mean blue, out of focus with color bars popping up?” Kind of a loose phrase.
Non-linear: all the time and nothing but.