Personally, I prefer the map/filter approach because people is now a let constant, but I work at a startup with people that don't come from a software development background that would have next to no idea what that line even means. So don't forget your code's target audience, I've personally had to back off some of the more functional styling in Swift just so I'm not the only one that can maintain our code base.

For that reason, I really wish Swift had list comprehensions, just because it's the first "slightly functional" exposure most non-developers get if they come from Python.