My experience suggests you have plenty of dual sporting left if you want.
In 1981 I collided with another rider mid-air off a jump during a Friday night stadium race. I shattered the ball of my left shoulder when I landed. Most painful thing that ever happened to me. I was 31 and it was a year getting back to normal. I stopped racing after that and concentrated on my career.
I started riding again in my mid 50's and so far no problem. I enjoy dual sporting at my own pace. I don't have full motion of my left arm, though, and I get bursitis in it easily. A few days in the gym with a lot of stretching cures it pretty quickly.
I've fallen off a few times, but never on that shoulder so far. Doesn't seem to be an issue.
Straight ahead and faster -Bo Weaver 1970
"There I was..." -Griffin Niner Three Hotel
"One day closer to a parade..." Jonny Gomes, spring training 2013