Technically not quite keeping pace with the times, Asus might have mainly aimed to keep the costs low with the 15.6-inch X507UA laptop presented at CES in Las Vegas. Despite the dual storage system, it is still relatively compact and light, and is already listed on the Asus website.
https://www.notebookcheck.net/Asus-X507-A-Compact-and-Light-15-inch-Laptop.277394.0.html