And while three of the five operas in the just-past season are available elsewhere in the world, if you wanted to see Menotti???s The Last Savage or Vivaldi???s Griselda, you had but one choice: to drive a few miles north of town to the Crosby Theatre and be among the happy few to witness these rarities.Don???t take the SFO???s pro-local motto for granted, though, especially since the company???s