BART is more commuter rail than metro (what is usually meant by "subway"). It provides transport from other cities into the city (SF), but provides little cover

BART is more commuter rail than metro (what is usually meant by "subway"). It provides transport from other cities into the city (SF), but provides little coverage in the city itself. For people living in very specific parts of the city (see: the Mission) the lack of a real metro has made BART into a pseudo-subway, but at the end of the day it's still commuter rail (the seating arrangements in a BART car is telling as to its intended purpose). San Francisco doesn't really have a metro system - it has streetcars that don't have exclusive right of way through the majority of their run.