Are you asking only about the Centurion lounges located in the USA, or worldwide? Are you asking only about Centurion lounges, or also Escape lounges, and Plaza Premium lounges which accept American Express Platinum, but not Priority Pass?
I fly mostly domestic, so mainly thinking about that. Yeah, I guess those other lounges count, too. Wondering if my priority pass alone is enough. Trying to think of airports I might end up in and think, "dang, I wish I hadn't given up the platinum card."