When I was younger, into the 1960s, the president of the US never appeared in public without a suit and tie. Or at least a jacket and tie.
Then late in the ’70s Jimmy Carter went on TV wearing a sweater. That was the beginning of a huge change. Now it’s routine to see presidents and presidential candidates in shirtsleeves. Our society, in other words, has gotten lots less formal.
So why shouldn’t classical music follow suit? And if the might and majesty of the U.S. government now doesn’t have to be represented by a gentleman in business clothes, why should classical music need to underline its importance with the kind of clothing even presidents would never wear?