The ATS launched in 2012 as the smaller, more fun and affordable alternative to the CTS. Considering Cadillac's previous small-car effort (hint: it zigged), producing a BMW 3 Series (video) competitor was a bold move, but one that was for the most part successful.
The ATS sedan was comfortable, well-appointed and handsome and had a solid selection of powertrain options. Over the years, it's only gotten better, but for some reason, people never fully embraced the pint-size Caddy like they did its bigger brother and that's kind of a shame.
"Production of the ATS Sedan is ending due to extensive plant upgrades, expansion and re-tooling to prepare for the next generation of Cadillac
," said Donny Nordlicht, product & technology communications for Cadillac. "Cadillac's future sedan portfolio will consist of three sedans, positioned in different segments and clearly differentiated by size and price. The CT6 will continue as the brand's prestige sedan and will play also the lead role as a new technology platform for Cadillac, as evidenced by the debut of Super Cruise semi-autonomous technology in the 2018 CT6."
Though it announced in July 2017 that it planned to pare down its sedan lineup, Cadillac has confirmed that it will make sure that the ATS sedan stays available until the end of the year so that anyone who wants one can get one, which if you've gotta have something reasonably sized, engaging to drive and American, you should.