It is really common to hear about mach 3 because it was the best/only control software most machines used. Those machines are large and expensive and tend to last forever. So anyone that has used a large machine learned on mach 3, and didn’t have any real access to the design computer. Now all large new machine come with proprietary software. We are able to use just about any control software you want…or none at all, most of use use the LCD.