Yes, my point is how many units could they possibly be making. Even when it was new it barely sold, how many units could they be making today? Dozens a month?
Probably more like a few hundred a month. But still, I can't imagine it employing many people at all unless they also used for overflow assembly or something.
Anecdotally, I've literally never seen a trash-can Mac pro outside an Apple store (and I even have friends that work at Apple).
That a huge change from a decade or more ago, when Mac pro towers were under every desk on designer teams and ubiquitous at Mac developer shops. The MBP laptops just didn't have enough grunt at the time.