Well .... since 78% of the air we breathe is nitrogen, I'm not sure I'd pay money to do a nitrogen fill on my tires. A few years back a buddy of mine worked at a tire shop that offered a nitro fill and did my tires for free. It might have taken one extra cold morning before they showed as being low. In my opinion ... not worth spending money for it, but okay if it's free.
That's a good article. But the coolest part is that you'd have valve stem caps with green tops indicating they are nitro filled. Think of all the fun conversations you could have at cruise-ins when everyone starts asking you why you did it. Maybe go with helium since it's lighter than air. Since it'll float a balloon, it'll probably make your car lighter - faster ET's. (Heh, heh, heh....)
Having worked military aircraft I can tell you nitrogen is stable at all temps and it is 99.9% moisture free which keeps your TPMS and rims in better shape than moisture laden air. (I had a 2000 Firebird with the chrome factory rims that rusted inside and kept causing tire fitment problems) If you live where the temps can swing from very cold to really warm in the day it is a big benefit over air.
I worked on military aircraft as well and although nitrogen is substantially more stable than air regarding temperature induced pressure changes and due to it's slightly larger molecular size tends to migrate through the rubber walls of tires slower, it DOES NOT eliminate those issues. That means that you will still lose pressure in your tires with nitrogen, just at a slower rate. While I can see the sense in using nitrogen in aircraft tires and race cars, those two applications have unique reasons for using nitrogen that the average car owner does not. Bottom line, it certainly won't hurt anything if you use nitrogen but doing so should not replace good maintenance practices.
We used it in accumulators as well as tires and yes there was bleed down in tires over time it was much slower (actually they usually changed tires more than put air in them). I like the moisture free part that air just can't give when it comes to the internals longevity
I disagree with not allowing corrosion causing moisture in. We had nitrogen in our daily driver which constantly had to have the bead area cleaned up and re-mounted. I’m sure some of that was salt as well. Don’t see the use in a daily driver car.