I noticed the dress change at my last conventions, over the six decades that I was in the people's dress had a quasi Amish feel to it, I had no real opinion about it but there was this certain feeling that I liked from the way they dressed, I recall enough brothers in sports jackets, now, the vast majority were wearing black suits, I can't even think of another setting where men would be dressed like this, I mentioned this to my Uber-Elder son who went into an apologetic involving black going so well in all seasons :) (absolutely nothing can be remarked upon) Changes yes, but creepy changes, I'm not a fan and would now be embarassed to bring an "interested" one,
:0)