Sorry I am late to the party- I was on the fence too, but after going through a couple of rounds with the connfigurator, it all worked itself out.
I had a devil of time upgrading becasue I lacked the prior experience of upgraging Duet FW. i was using RRF2 for LPC and bought a used Duet2 that did not come with the SD card.
But despite the potholes on the way, I think it was worthit for me.