I saw that the other day too. I think it looks like a great idea.
My RAMPS board has a total of 5 driver sockets.
I had been considering using 2 drivers each for the X & Y axis and then figuring out all of the modifications to the firmware to make it work.
This solution seems to be better by far
…it still leaves me with 2 driver sockets on the RAMPS board in case I need them for extruders, while providing an individual driver for each motor.
I’m also still considering maybe using the Mechaduino closed loop controllers that mount directly on the NEMA17 motor.
But first of all, I intend to ensure that my existing drivers are tuned properly!!
Lots of great choices.