Dark ages? Chuckle. You have been deceived by the popularity of the cheap little 3D plastic printers - which are just toys.
The world of CNC has progressed a long way beyond that, but because of the power and precision involved, so has the cost.
Do a search for 'Boris the spider CNC' (NOT the pop group!), and see what is possible. But note that the SW cost close to $100k and the machine cost about the same - and I think it took 48 hours for the carving.
Oh no, not the 'dark ages' by any means.
Cheers
Roger