Buick is the oldest American car brand still active in 2026, and the fact that it made radical changes to its persona in order to survive is probably one of the least likeable aspects of its history. Think about it this way: the company that gave is the Wildcats and the Rivieras, the Skylarks and the Roadmasters, the GS and the Century, is now making SUVs. At least it’s making something and it wasn’t axed like Pontiac and Oldsmobile. But seven d…