Opera is, to me, about a sonic and visual spectacle. A good opera, for me, looks really good and sounds really good. If the orchestra doesn’t sound like music, then it had better look amazing. If the singers aren’t up to scratch, then I hope the orchestra can pick up the slack. If the sets, costumes, or staging are drab, then there had better be some powerful music. “Tristan & Isolde” at #sfopera (closing tonight) has some great singing (but not across the board) and the orchestra does what it can but the score is the score. “Best (T & I) I’ve seen…” is like saying, “Best dog turd I’ve found on this sidewalk.” Even if it’s true, who cares?