There are some consumers , there are some people or senior

citizens , when they see  a   15.6 inches   " Touchscreen "          " Auto-rotate "   " 360 degrees foldable "    5G Cellular Laptop , like for example , this ,   which can unfold to  become a  15.6 inches  Tablet , they love it so much .    The main reason I believe is  that for people or consumers or  senior  citizens  who want only one computing device , 15.6-inches screen size hits the sweet spot.  It is the minimum screen size to achieve the kind of usability , required in having only one device , required in having only one computer ,  required in having only one machine which they can use as a Laptop , which they can use as a  15.6 inches Tablet and above all which they can use as a  5G Smartphone.