Lots of factories interface to CNC mills and such with old DOS hardware. If it ain't broke, etc. But like the article says, they do break, and it's a PITA to repair them. (On the project I'm on we're spending squillions on new PLCs for that reason. They have been getting their spares from ebay for a while now.)

Sounds like McLaren's DOS dependency is basically down to a hardware dongle. Fucking DRM!