Toyota used to produce ~440k cars out of that plant. Tesla does ~360k. I'm not sure that "fisher price playset" vs disneyland is the analogy that I'd use for that difference.
NUMMI was Toyota's oldest and least productive US factory, and the cars were produced on contract for GM, which sold them under a GM brand. This is one of the reasons Toyota closed the plant and sold it to Tesla.
NUMMI is also not the factory that Toyota shows off in its videos demonstrating the awesomeness of its manufacturing processes.
There's more to plant quality than output alone. I'd expect a "disneyland" factory to have other metrics, like low rework, safety, worker satisfaction/retention, responsible procurement & disposal of raw materials, etc.
NUMMI is also not the factory that Toyota shows off in its videos demonstrating the awesomeness of its manufacturing processes.