All very good reasons why one shouldn't simply apply test results of how nitrogen works in car tires, to bicycle tires.
Bicycles tires have: 1. A much smaller volume of air for the rubber surface area
2. Thinner rubber
3. Higher pressures, except perhaps for the largest "balloon" type tires
For myself, all my bike tires are in the 35-47mm range, 80psi tops in the rears, I just pump up with air. If I had nitrogen around for some other reason, I'd use it, but won't go to the trouble & expense just for the bikes