Every year I present my son with a nice casual shirt, from a store he likes (or, now I realize, used to like). In the past, the shirt was always some kind of plaid. This year I asked him if he wanted one and he refused because he doesn't want a plaid shirt anymore. This is a big change! Later I asked him to clean up some stuff of his and he systematically donated every plaid shirt he had.

Today, I was ironing my own plaid shirt and it occured to me that I didn't see much of them around me. Hence my question.

I need to mention I'm Canadian, where plaid shirt have been outfit staples