When I was flying at Whittier Narrows in the Los Angeles area in the 1990's we had one club member who watched us fly with the down the line electronic controls. He told me over and over and he really really liked the 3-line handle and controls, we challenged him to build and fly an airplane with the electronic controls (he used the single function servo driver, throttle only setup). He told me over and over that we was going to hate the electronic controls, so I made him an offer to buy all of his equipment that he purchased for the price he paid if he hated the electronic controls.
After the first test flight with the model was flown with a 2-line stunt handle and set of lines and a single channel servo driver hooked to his belt he landed, put the handle down and walked up to us and asked....
How do I convert those over to electronic controls right now...he was pointing to his other models that still had 3-line throttle control set-ups in the model.
I have also had models ground loop on me several times (coming towards me) and I simply throttled back and shut down the motor, electronic controls and 2.4 Ghz does not care if you have line tension or not, you always have control of the throttle. Unless you have line tension with 3-line you do not have control of the throttle.
Fred