The QWERTY layout has been around for so long that it is difficult to just change to something else. People are used to the well-known keyboard interface to the

The QWERTY layout has been around for so long that it is difficult to just change to something else. People are used to the well-known keyboard interface to the computer/smartphone/tablet/... and actually expect it that way, no matter how inefficient it may be. Of course, you may switch personally to an alternative layout, but the overall design used by everyone else will not change. It's just a burden for yourself to be able to type two different layouts with comparable speed as you cannot change the layout everywhere you use computers.