As an inveterate theatergoer since the age of twelve, I've chronicled in these columns and elsewhere about the days when I saw shows on a weekly basis in the late 60s and early 70s. I've also made it known that by the end of 1972, I was burned out (two hundred shows in four years) and stopped going practically altogether. Diminishing returns with regard to most of the plays and musicals I was seeing depressed me (it …