From my observations (highly generalised of course):
young people will go for a hatch or a small SUV. They also mainly buy used as its what they can afford, so no real impact on new car sales.
blokes with families will go for a dual cab or a SUV, with a hatch back or SUV for the wife (mine has a SUV hatchback, so she covered both bases
).
There is a certain demographic that will look for a sedan, generally an urban based professional or real estate agent that would be looking at something at the warm end of the performance side of things and turn their vehicles over every few years, but they wouldn't be caught dead in a Ford when a BMW or Merc is available.
Fleet buyers were another market, but even they are going for small SUV's now.
I'm guessing they finally realised that there wasn't much to be gained by building for a market that isn't there anymore and they wouldn't be competitive in anyway.