"Robert Swinney" writes:

Bob (RPN is like trying to run CNC with no manual machining experience)
Swinney

That seems backward to me. RPN is like writing a CNC program that
carries out operations in the same sequence and with the same feeds and
speeds as the way you'd naturally do the work manually. It's like
"learn mode", where you do something manually and the machine records
that for later use.

AE is like entering the dimensions of the part and letting the computer
figure out a sequence of operations that will make it. If it works,
and is fast, and gives good surface finish, great. But if something is
wrong and you have to fix it, you're worse off. You may not know where
it went wrong unless you look at what it did step by step.

Dave