As far as I know the old Packard motorcar plant in Detroit is still empty and forlorn. But, and I don't know how to say this -- the world has survived the demise of what was the "Cadillac" of American cars back when Caddy was just another brand. I know a firm that made horse collars and buggy whips and seat covers for (horse and) buggy seats. Some young whippersnappers in the company wanted to make stuff for new-fangled automobiles but the old timers said no. They split the company and the new company made million of $$$ making auto seat cover replacements. The old company kept making horse collars for years -- sometime a half dozen in a good week. Think about it.