Growing up in the 70s and 80s plaid suit coats were common, very common. I loved mine I wore in high school it was mandatory to wear suit coats. I had a few blue ones, one yellow and my favorite plaid. It had about 3 colors.
I always see on MSNBC and CNN men with usually dark blue suit coats. Plaid stands out. I loved mine. If I had to wear one I would wear a plaid one. My hs one no longer fits.
Who recalls them.
Oddly I hate plaid shirts.