Do you need nitrogen in your tires?

Nitrogen tire inflation. How feasible is it for serial tires for everyday driving on the "home-work-home" route?
Air is almost 80% nitrogen. Is it worth overpaying for a higher concentration of nitrogen in your tires? Today we'll explore the pros and cons of nitrogen inflation. 

Let's agree, few people check tire pressure twice a week, as required by safe driving rules. At the same time, tires have natural penetrating properties and air gradually escapes, and the recommended pressure decreases. Nitrogen is a less penetrating gas than air, which means it seeps through the tire walls more slowly. This helps reduce tire pressure loss, providing more stable pressure over a longer period. 
BUT, what's the difference in air leakage compared to a nitrogen-filled tire? It's minimal. More precisely, it's so minimal that your trunk's pressure gauge probably won't show this difference by the end of the season. The reason is, of course, modern materials. The sealing layer inside the tire passes air molecules at a minimal molecular level, but this is not a noticeable difference for car owners. 

The second argument in favor of nitrogen may be more stable tire pressure when heated. If your car has tire pressure sensors, you've probably noticed how it changes as it heats up during driving. This is a natural physical process and normal for air. Nitrogen, in turn, has a significantly lower thermal expansion coefficient than oxygen. But if we critically look at this advantage, for civilian use "from traffic light to traffic light" it's a questionable and barely noticeable advantage.  

In some special cases, such as aviation and racing cars, the use of nitrogen allows for more precise control of tire pressure at high speeds and extreme conditions. In this case, pressure stability at ultra-high speeds matters. Moreover, the advantage of nitrogen in the event of a fire is also present, as it is an inert gas and does not support combustion in the event of an accident and vehicle fire, like oxygen. Therefore, the use of nitrogen in sports or aviation may be justified, but for civilian transport with daily use, this advantage is questionable.