Elon is trying to enforce no-frills now, too
Personally I loved going to houses seeing everyone dressed alike. It showed unity, and it makes it easier in the crowded rooms to see where sisters were. Last year we all wore the same shirts, etc, but this year we could just say "wear a polo shirt in one of three colors and a denim skirt that comes to your knees." It's much easier to regulate proper attire when we all dress alike.