A lot of people rely on friends as non-monetary resources. If I get locked out of my car right now I'll call a family member to bring me a spare key. If my car is acting up I have a friend that will look at it for me. I do a lot of tech support in return, not necessarily in exchange for other services in a direct way. It's just being part of a community. At least in my world (midwest US) I cannot imagine moving to an unfamiliar area as a form of resource management. I think this probably gets more extreme the more your financial resources are strained.
Having close family nearby is worth a hell of a lot of money by non-FAANG-wage standards. Hundreds to thousands of dollars a year in saved vehicle and equipment rentals or purchases, Ubers (car breaks down, need a ride to work), and so on. If you've got kids and have some nearby family happy to provide child care, we're talking hundreds a year in babysitters on the low end to many thousands if they can replace daycare, before/afterschool care, that kind of thing. That's a lot of money to most people.
But with UBI, maybe larger networks of people could move together. For example, a single mom can't move to a new city to take a job because she relies on her parents for childcare, and her father can't leave his job. But with UBI they could all move together if it made sense for them. Her extended family could move with her and pay for expenses with UBI until they all found new jobs.
I agree, I'm sure there are cases where UBI would enable people to move, I just don't think it's going to be a big paradigm shift/massive migration/stir the melting pot kind of thing.
That's definitely true for those that have networks with some amount of wealth. For instance, if your family member doesn't have a vehicle, or works a job with inflexible hours, they might not be available to bring you a spare key.
My wife and I are friends with a young single mother who, until recently, didn't have such a network (my wife met her through a mentoring program). She grew up in the foster system, suffered abuse, and went to an alternative high school. Her network consisted of family members who were themselves barely scraping by, as well as school friends who were in similar straits. If your network doesn't have the resources to support you, it's not nearly as valuable.
All that being said, I have a similar feeling on moving away from our community; but our network has a lot of people (family, friends, and acquaintances) with money and connections.
