If sure there’s a pros and cons list for green screen vs LED wall, but honestly I think it’s just so amazing that LED tech has come as far as it has so quickly!

Mostly walking and subway, with the occasional taxi. I live in a major US city with an existent public transit system though.

Surprisingly, yes. Filming on location and all the logistics that go along with that can balloon the cost real fast, especially for multiple locations. (Site fees, travel, talent costs, additional security, a separate crew unit, etc) CGI allows you to create different locations through green screen, which majorly cuts down on a lot of the scheduling/logistics. Sometimes green screen will be just a window, other times it will be literally the entire set.