All true…
Until flying low altitude thru -65c and punching through a Maritime warm front. 30% humidity at -65c to 99% at -2c in about 15 miles. Starts out like hoar frost then a nice rimey layer. Serious, “Oh Oh” moment. We call them Chinook. Have seen the temperature in my backyard go from -40 to +5 in the time it takes get a beer, (bit exaggerated, but not much).
It is a real treat if you are going out skating for the afternoon but not something you like to encounter while flying.