Nope. Just wearing a jacket and tie around the office arouses suspicion of being a flight risk (bad sign, I know), so occasions to wear are few. Even worse - there aren't enough cold months to justify a three-piece, and the warm months make even a vest intolerable. I could see it if I moved to a place that has a proper winter.
1 Navy blue in Super 120's
1 Gray herringbone tweed
Both are bespoke with a fitted vest ( without the back adjustment band ) the vest is built like a jacket, front and back are made of the suit cloth... the inside is lined in the same color as the suit is lined indeed.... they are beautiful vests...
My last four WW Chan suits (2 Clayton 150s, 1 VBC 130s, one heavier Scabal wool/cashmere) have been made with vests. I find the vests to be of limited practical use in LA due to the weather--there is about a four month window where I wear them, and the rest of the year I find them to be uncomfortably warm.