I think our team would really have to be rebuilt in a special way for KG to come back after this year (likely in a reserve, 15-20 minutes a night role).
I don't think most of us realize the extent to which KG plays through pain, especially by the end of each season.
I'm a huge fan of Ray Ray, and I'd love to see him retire in green, but if he wants to spend the last few years of his career competing for a title in a bench sharpshooter role, he should probably go to a different team (again, barring some crazy unforeseen rebuild). Any contender could use a guy with Ray's talents.