Something I've noticed is that, as far as the residents of Twin Peaks go, Ben Horne was really one of the only people who dressed as if it were the 1980s.

For the most part, the residents of TP dress like they're in some sort of timewarp with a nexus point somewhere in the 1950s. Donna, Laura, Leland, Audrey, James, Doc Hayward... All of them are consistently clad in retro/outdated fashions. Ben Horne, though, is thoroughly modern in his power attire and track suits. I wonder what the decision behind that was (and where in the world they came up with Jerry's French hillbilly pimp getup).

Simple: Ben was a yuppie when yuppies were king.

Since most folks in Twin Peaks probably had to get their clothes at Horne's Dept Store (because they couldn't just scurry off to Seattle whenever they felt like shopping), Ben could corner the market on late 80s fashion in their neck of the woods. Keeping the local peasants forever a few decades behind him.

Behold the genius of Ben Horne! muhwahahahaha

Audrey just did the 50s thing to spite her dad. That's why she swapped the saddle shoes for red heels once she got to school. Puff puff, Audrey!