I'm glad to see the "truth" about nitrogen is now being told and generally accepted as fact for general automotive applications.
That said, dry nitrogen is still used in NASCAR, other sanctioned racing groups, commercial aircraft, military aircraft, the space shuttle (now defunct), and other critical pressure applications where oxygen under pressure could be a fire hazard or cause accelerated corrosion due to its presence. Remember the 3 astronauts who died on the launch pad in the early 60"s? Not really an issue with RV's in general.
Chum lee