This happened to me twice with Uber black and that was enough to abandon the service. Weird that I've not observed this behavior among Lyft drivers (who I'd expect to be part timing it).
So these are people who live outside of the United States that describe their nationality as "American"? Do any of them live in countries that actually have "America" in the name?
If someone is able to purchase food at a supermarket does it follow that this same individual cannot also have difficulty understanding a hierarchical filesystem?
"This is a very nice theoretically clean and powerful sequential data structure, but in practice it is very very very very very very very very very very very slow... very very slow. No one uses finger trees because they're so slow." -Daniel Spiewak
From his 2011 NEScala talk on functional data structures, covering practical considerations like locality of references and caching. Available on vimeo http://vimeo.com/20262239