Back in the early '90s, GM used to offer the W-Body with the Quad-4, 5MT, and the FE3 suspension in the Oldsmobile Cutlass. In hindsight, man, that would have been a really cool car to have in the driveway. Realistically, I can't imagine they sold any at all. The W-Body, at least in 1991, was a very competitive chassis that was tailored to a wide variety of tastes that, in some respects, was reasonably class-leading.
...But by the time the 2000 Chevrolet Impala came around, the expiration date was coming up. The Impala was arguably the worst of the W-Bodies of that time, perhaps only the Buick Century getting as bad as the Chevrolet. It was a bean counter's car in design and execution, which made the Lumina look good by comparison. Sure, the later 2006-Infinity update made the car much more tolerable, but even then, it didn't become a good option again until they added the corporate 3.6L V6 into the mix.