One Good Thing

Joni Mitchell's triumphant comeback

When it comes to popular music, I have always been weirdly out of step — if not out of tune. During my most formative years (those years when the sticking power of popular music first strikes), I got sidetracked into Broadway musicals — thus missing the entire musical catalogue of the 1960’s and half of the 70’s.

(You know that kid who has never heard o…