Andrew Porter passed way yesterday at the age of 86 in London. NPR has filed this obituary on Porter, and the New York Times has another, very entertainingly written one, here.
I met Porter once in Toronto, Canada, when the Four Seasons Centre for the Performing Arts (home of the Canadian Opera Company) opened in 2006. I was there with a number of my music critic colleagues, and Porter had given a talk related to the Ring Cycle, which was the initial production for the new opera house.
Also, I should thank opera critic Mark Mandel for alerting me about Porter's death.