It is late 70's, 80's style all over again. Thats when I last had mine.
I enjoyed a navy pinstripe three piece for my banker meetings and major presentations in those days. I also had a nice tweed three piece for more casual dressy events and travel. That suit was amazing when I ran into bitter, cold weather.
But after a couple of years, the extra layer, with a vest just seemed a little restrictive and I enjoyed moving on to newer, modern two-piece styles.