What fastball said. You'll see Buicks during the Woodward Dream Cruise, but they're not as popular because few younger types could afford them back in the "good old days," so they buy and fix up Chevelles instead, because those were what they lusted after as "kids."

Acura does occupy the market position that Buick, Chrysler, and Mercury occupied back when Detroit automakers were kings and these marques were the showcases of luxury-and-power, even though they weren't so far away from really being Chevys, Plymouths, and Fords, the way that Acuras are nicer Hondas.