I feel like at least half of the things listed are trends that have come/gone within the showing lifetimes of many BB members. When I was a kid in the 80s, everything went in fullcheeks. In the late 90s/early 2000s, everything had one of those Beval halfpads. Everyone also had puke green TS and those awful GPAs.
Now, could I legally, under the attire rules, walk into the ring in a stripey GPA and puke green TS and a Beval pad? Sure. But odds are if you’re walking in the ring like that, you’ve been out of the ring a while. Even locally you don’t see folks turned out like that.
I actually participate in the last formal appointments class in the rulebook–ladies’ sidesaddle. And for that I do take turnout very seriously. But then that does make me want to have a little more fun with attire when I’m not specifically being judged on my glove color and earring choice–I’ve pinned at As in rust breeches, and non-white shirts, and in a pelham. But if you walk in the ring and stand out for whatever reason, you have to back it up with the ride, and make yourself look like you’re standing out a little because you’re just that good and you want the judge to really notice.