I think you're not really appreciating the arbitrariness of a many of the things you say, ie: wearing only Plaza lasted longwings is an 'ok' idiosyncrasy, yet having a curved yoke isn't. And how much of an idiosyncrasy is having a curved yoke anyway? We know the style is acceptable within the greater canon (see Western coats), so is it that much of a leap to adopt a feature of an accepted garment and apply it to to another piece? And what if someone found a picture of such a coat? Then would it be ok?
I guess it comes down to this: I think you believe that is a much more cohesive and defined canon of classic menswear than there is. The reason I mentioned the hundreds of different configurations and styles of overcoats that can be considered 'classic' is because of this. Clearly the tailors who were first innovating and making the garments that developed into what you believe is the classic menswear canon were much less restrictive than you have become.
Finally, you're right that a button down collar suggests a certain casualness, but I would also argue that having a curved yolk also suggests something -- both garments are conversant, and I would describe neither act as 'functional.'
I guess it comes down to this: I think you believe that is a much more cohesive and defined canon of classic menswear than there is. The reason I mentioned the hundreds of different configurations and styles of overcoats that can be considered 'classic' is because of this. Clearly the tailors who were first innovating and making the garments that developed into what you believe is the classic menswear canon were much less restrictive than you have become.
Finally, you're right that a button down collar suggests a certain casualness, but I would also argue that having a curved yolk also suggests something -- both garments are conversant, and I would describe neither act as 'functional.'

















