If you have been flying for 5 years, and haven't destroyed a plane yet... Than, yes! You are flying too conservatively. Like playing piano, you have to push the limits of your ablities in order to progress. Although I have been flying R/C for nearly 30 years, I still have an occassional crash. It is usually an engine failure that damages my planes. It is impossible to recover from an engine failure when you are hovering a few inches off the ground! My simulator has increased my abilities exponentially. I probably would have crashed at least 20 more times, if it weren't for my sim!

As for your question: Can an R/C pilot platua? YES! But, only if they are afraid to push their limits!
Doug