I noticed that in the profile there is a location field, but not a nationality one.
For instance I live in Chicago but I'm from Italy.
I foresee answers/comments along the lines: Instead of asking why it is not there, ask yourself why should it be, so I'll try to anticipate some of them.
for the same reason age and location fields are there. I like to know more about a person when I look at their profile: age tells me something. Location too. Nationality adds extra information on top of it. Knowing that a person is from a country and now lives in another, gives me information about their cultural background.
statistical purposes. You know that most SO users are from the US, but what you actually know is that most SO users live in the US, like myself. Nationality provides extra statistical information, which might be useful. (Ok, probably most SO users are also born and raised in the US, but you get the point)
So my question is whether the choice of including location, but not nationality is a well-thought design choice and - if so - what's the rationale behind it.
Are there downsides/implications I didn't consider? Are the upsides I highlighted not relevant enough to SO for going through the hassle of adding an extra profile field? Is Location more relevant than Nationality?
Before you reach for the downvote/disagree button, I'd like to make clear this is not a feature request, rather just a curiosity about what are the criteria behind the selection of profile fields.