I have that my android phone ditched the ability to swipe up in three spots and replaced it with a single swipe up you have to hold to do what I could do with a quick swipe before. There is no reason they needed to remove a perfectly functional and simple option to add one. They kept the option to have three buttons at the bottom to take up acreen space, why not have three options?
They were designed to be cheap laptop thin clients for google web apps.