Clearly four-seat convertibles aren't as popular as SUVs.
GM's Opel and Vauxhall brands were purchased last year by the PSA Group, which includes the French Peugeot and Citroen brands. So far, the sale hasn't affected the Opel or Vauxhall model lineups, nor has it impacted the few Buick models that are built on Opel/Vauxhall platforms. Now we may be seeing the first repercussions of the PSA sale, as Autocar reports that the Vauxhall Cascada is now dead after only a few short model years.
Vauxhall Cascada production had already ended a while ago, but the car continued to be sold until supplies ran out. Vauxhall only sold 200 Cascadas through all of 2017, and only shifted 850 units in the car's best sales year. The Cascada will continue to be sold in other parts of Europe as an Opel, and Buick hasn't given any indication of cancelling the car in the US. According to GM Authority, Buick has only sold 2,292 Cascadas through the first half of 2018. If this pace continues, it would be an 18% decrease over 2017 when the company sold 5,595 units.
During its first model year in 2016, the Buick Cascada had it best sales year with 7,153 units, which isn't massive. The Cascada is clearly a niche model for Buick, and GM doesn't really market it alongside other models in the lineup. We wouldn't be surprised if the Cascada is discontinued after 2018, or 2019 to sell off excess units.