I think its way different in the EU vs the USA. In the United States, the number of people with passports HAS dramatically increased in the past 30 years, going from ~5% to a little more than 50%; but we mainly use them for traveling once or twice / getting into bars when you’re a 22yo with a misplaced driver’s license.
More relevant to the topic at hand, it’s extremely rare to receive an unsolicited call to an American phone number from a number outside the +1 country code. So I’m sure when an immigrant in the US gets an unknown call from their home country code, they can be pretty sure the call’s intentional and worth answering
> it’s extremely rare to receive an unsolicited call to an American phone number from a number outside the +1 country code.
Can't be THAT rare, can it? Isn't 15% of the current population in the US immigrants? Most of us immigrants do receive and make calls to our "mother country" every once in a while, even introverts like me. Or maybe you were excluding immigrants in that as you mention immigrants later?