Ken, my friend's mom had her 2 level fusion almost the same time i had -at 86 and guess what? I need another surgery, still can't walk and she is walking 3 miles every day!!! I am much thinner than she is and much more fit than she is !!! Go figure.
I agree - quality is what we need to have a normal life. If you every day in pain - go and do what you have to do to feel better.
We will pray here for you and your speedy recovery!