As the article says, if you want precision and repeatability, you don't use a FDM in the first place, you will mechanize the piece. As an engineer I use my FDM

As the article says, if you want precision and repeatability, you don't use a FDM in the first place, you will mechanize the piece. As an engineer I use my FDM machines in order to detect "bugs" in my design, easily and cheaply. I don't need to cut a block of aluminum that volumetrically encloses the piece I want, unless I am certain the design is perfect. The great advantage of FDM is the ability to print with support material anything, not just 2.5 D designs like normal milling. 5D milling is way more expensive and complex. tenths of a micron in FDM? You are lucky if you get real 5 micron accuracy in a FDM printer. I print most of my designs 2x or 3x oversized to really understand the prototypes. In the end I will use SLA machines lost wax and machining to finish the process.