I got friendly with our salesman at the Caddy dealership in Cincy. He told me nearly all their profit came from Escallades (and used cars). He said they sold them at list, every time. They had one on the floor MSRP at $95K in 2016 and he commented it would likely be sold that day. One obviously can buy the Chevy equivalent with the same functional tech, maybe not Super Cruise, at much lower pricing. The folks who buy these are interested in the Bling.
The fact Audi et al. may offer superior performance is not relevant.