Company X does robot control or motion control. Do 3D printers need such a technology ?

Ink jets and laser printers need 2D motion control. Who sells ink jet or laser printers ? robot companies, motor control companies,  or motion control companies ?

Do you really believe control is the most important thing of robot controllers ?  I am familiar with classical and“fancy” control theories and I have a long list of control projects in which I have been involved.  If you have an universal controllers that work well on every control application, please let me know. I often day-dream of such a controller. 

You can religiously believe  motion control is the flesh and blood of the 3D printers, if you want.  I read a very entertaining  post,  saying a medical robot company has a core technology needed for 3D printers. Of course, that person is a stock holder of the medical company.