I know this is a rather controversial issue. I was skeptical as well before doing this on my car, and I have not refilled my car tires for several months. Before that I needed to adjust the pressure every couple of months at least.
Now I think it is a good idea to try this for our bikes. Especially since, when I see I need to fill up my bike tires, I get too lazy and give up the ride altogether.
Is there a way to do this at home?
EDIT: I thought I'd update the question for people who come and read later:
Thanks for all the comments, I drive a lot (30kmiles/year) and I saw (to my surprise) a significant difference with nitrogen.
I understand the reasoning with losing oxygen over time and increasing the N2 concentration but in practice that does not happen fast enough.
I think I'll look into Helium/Argon and I'll update you if I managed to do something interesting.
And I live in a small place I don't like to have a large pump but that is exactly why pumping is such a chore for me,