That's an excellent question- at the end of the series they were all "Oh, so now we should probably go tend to that other Hellmouth that's in Wichita, you know, just in case." and all I could think was "YOU MEAN THERE'S MORE THAN ONE??? DOES IT MIGRATE?" and "WHO WAS MINDING THAT STORE WHILE YOU BASTARDS WERE SWANNING AROUND SUNNYDALE? DAMN IRRESPONSIBLE TEENAGERS!"