I think Frank, put his finger on it. My own take would be that Thistledown's characterization of what is fashionable is suspect. Or if not suspect, at least beside the point. Many would wear buckle shoes...ala the 18th century...as a matter of preference with evening wear and it would, I wager, be considered not only perfectly acceptable but even a cause for some admiration.

There is a rather famous, recent photo of Sean Connery wearing a Montrose and a Jabot. He looks as good as it gets it Scottish regalia.

I think that when one commits to honouring the traditions...and not just re-enacting or adhering to rules...I don't think it is ever wrong to look to the "founding principles."