The last time he talked about its launch, Frank Azor said that the Dell XPS 15 9575 convertible with 32 GB of memory should arrive at the end of the year. Now, he just revealed that this might happen in the first quarter of 2019 and he also added that a 4G LTE-enabled version will not be released anytime soon.
https://www.notebookcheck.net/The-Dell-XPS-15-9575-with-32-GB-RAM-might-show-up-in-early-2019-no-LTE-version-in-the-cards.328690.0.html