I advised my bosses to walk away from a support contract at a foundery,
As the sporadic support calls to attend, usually came in at peak times of other (& more profitable) revenue streams.
As the contributor states "You only had to go to the shop floor briefly to spend the rest of the day stinking of dust and metal," not only that but feel the "tang" of it in your mouth & keep the feel of the metal dust on your skin. So one hour into the working day, you felt like you needed to go home & start afresh for the rest of the day.
They were using locked down builds (No they wouldn't give us the Admin password) that were tighter than the later builds I encountered in the pharmaceutical world I later encountered.
It was domestic grade computers & printers, that really didn't like accumulating metal dust on it inside or out.