OK yes I can see the advantage of this, especially on larger boards. for me it wouldn't be worth it, the only boards I do are 100x 100 max.

Interesting software though especially as it can do proper lathe threading.
Just my take on it compared to Mach is that in Mach we can have just what we want on a screen and a lot, in fact all the alternatives I have seen like this one and Berts offering is that they are written by programmers, not engineers or users and have screens full of bling