Here's a fact. My 2012 Sierra had Nitrogen in the tires and during cold mornings the pressure was lower just like with conventional air.Facts.
What you don't want in a tire is humidity. Water vapor. It affects tire pressures to more of a degree than dry air.
With nitrogen, you won't get any water vapor.
Fact. Nitrogen will not migrate through a tire like oxygen.
Fact. Water or water vapor in a tire is likely to cause corrosion to both steel and aluminum wheels.
When I have tires put on, you won't see anyone sop a wet mop around the bead. I aint having it. That is shade tree right there.
Each to his own but the facts bear witness that nitrogen has it's advantages.