I ditto a lot of the above in the difficulty of skiing with an RTP or even the Radar hybrid after decades of double boots. Although I leave my rear boot loose, my feeble attempt without a rear boot was not good.
I have to admit, I did not give it a fair chance. Like @aupatkingsaid, why bother?
I didn't like it, I went back to what I am comfortable with.
But, part of me still wonders, what I am not doing "correctly" when freeing up my rear foot that makes my sking seem so out of control?
And, if I were to persevere through the transition, as @twhispernoted he did, would I learn some valuable technique improvements I could take back to double boots?
Thoughts!