Not everyone has a well paying tech job. Many have to use their devices until they literally die and many more choose to do so because getting a newer device would mean having to deal with the bullshit of newer software.
I've just 'upgraded' a friend who was using a ThinkPad T410, released Jan 2010. So sixteen years. There was nothing mechanically wrong with it except it was capped at 8GB RAM and chugged along slowly.