He has always looked fragile ' e. to me . At the age he ll come back he ll likely get hurt again and something totally different .
Starting over might be a big mistake at another team . He know how hard it is to lead a team , it won't be any easier as he gets older and he may not have a good coach or support he has in GS.
If i was him i d just fade out with Klay and Steph at GS and then hang em up.