Hi, I'm the author of TFA.
I generally agree with you. It's definitely NOT something you'd use to replace $200K of aircraft-grade machinery, but more than adaquate for computer geeks (such as myself) for the occasional project. Considering that the price of such machines is only going to come down in the next 10 years, I don't see any reason why all manner of engineers couldn't--in the forseeable future--have one at their disposal. With a bit more polish and robustness, home fabrication could eventually become more like a household applicance than something only for geeks.
Kindof like computers.