Nitrogen filled tires? Pros and cons

I actually got fairly depressed when I saw that my regular shop started advertising the nitrogen fill service. It made me think I should change shops even though I’ve been using them a long time. They did just recently do a large expansion - lots more bays & employees, etc. I’d bet they have plenty of big debt to pay on. So I’m hoping they won’t go “corporate” style on me.

I have to get a new set of tires soon & I buy from them. If they try to sell it to me, I’ll at least get the chance to say “c’mon, you guys used to be a serious place”