Sumptuousness used in a sentence

Sumptuousness in a sentence as a noun

"If the first two carriages in each train cost three times as much as the others but offered free Wi-Fi, and were furnished not with basic seats but with the sumptuousness of an Edwardian-era New Orleans brothel, you could afford to run more trains.

To me, luxury is "opulence, luxuriousness, sumptuousness, grandeur, magnificence, splendor, lavishness, the lap of luxury, a bed of roses", and I don't associate those with typical developers.