When I was new I deliberately left the SL on for about three months after doing some testing. I was flying the La-7 at that time and I figured that I would not get that much from disabling it, as I was mostly flying it BnZ / E fighting. This crutch allowed me to concentrate on learning all the other stuff flooding me at that time, especially tactical and battle SA.
Indeed I later found it not to make much difference in that plane and with that specific fighting style. However, once I started to explore the whole planeset and had the necessary basic skillset, turning it off became a necessity. But I was ready for it by then.
YMMV