I don't personally believe it's ever been true that users want the same UI styling across apps. When given the option to customize the colors or layout of an app, users will do that. People want their applications to follow common UI patterns, but applications should have some kind of personality to them, otherwise they just look like Microsoft or Apple products
If you follow common UI patterns, your app will look like Apple or MS app, and there's nothing wrong with that. For a long laundry list of reasons: https://news.ycombinator.com/item?id=41368184
