I hold my opinion here: Even with Android, HW keyboard does have a lot use, for example, under Android 7's split screen, with on screen keyboard it's almost useless because your on-screen keyboard would block almost both contents, but with HW keyboard user can type in one app while look at another, like typing while reading web, this is a huge difference. And HW keyboard is more accurate and without the fluff of autocorrection, and free up screen content. To me it make a phone phone.