Cadillac has confirmed that the three-row luxury SUV, XT6, will be discontinued by the end of the year.The XT6 fell short in terms of distinctive character, upscale presence, and interior design when compared to rivals.Cadillac is focusing on a future lineup of electric vehicles, but will continue to offer updated gas-powered models until after 2030.The retirement of XT6 is part of Cadillac's strategy to move towards a sleeker, tech-forward portfolio in the luxury market.