Great write-up as usual Monte!
I do not have much to comment on, but here are my very limited thoughts.
The Vanquish coils in my opinion are some of the very best I have used. The Vanquish machines were my first time experiencing SMF technology.

I have been and continue to be impressed with them.
If the X-Terra Pro uses them on a new machine, I will be all in to try it out.

I would think this new machine will be a close competitor (or superior given the adjustable frequencies) to the Simplex+. I very much still enjoy using that machine with all 3 available coils.

That said, I really want to try out he X-terra pro in the future.

I enjoy the Vanquish machines so much I just closed a deal on a used 440 with a new V8 coil. The price of a new coil alone is about 100$. The price I paid gives me the machine at around 70$. I look forward to having 2 V8 coils at my disposal, and having 3 Vanquish machines running at once.