My understanding of manual machining in the modern day is that only really big or really specialty jobs (as in, just a weird process that there isn’t a good CNC machine for) are done manually anymore. But specialty and low volume, which is exactly where LLMs are nice because I can spec it exactly how I want. I wonder what the software equivalent of “big” is. Like, you need a part made on a lathe with a 3 foot diameter throat, only one guy in a 500 mile radius has a machine that big, from 1962, so he’s your guy. That guy can stay in business with manual machining. But standard, high volume parts need to be on CNC to be competitive.