I've been using a Mk3/4 Planet CNC board for a few years already, also tried other boards and software during that time, the Planet CNC stuff still works best for me.

I'm looking into building a new CNC milling/routing machine, with 5 axis capability and for that I think I'll go with the Mk3 9 axis board; I didn't check the Planet CNC website for a couple years and was very pleased to see that the new version of the control software works in Linux on a Raspberry Pi which is exactly the kind of thing I wanted to have. So here is my question, would a Raspberry Pi 3 be powerful enough to run a 5 axis machine?

Besides that I'm interested in knowing what differences, updates or new features the TNG software has compared with the previous CNC USB Controller one.