Android isn't a productivity platform, but on the Tab S4, Samsung's DeX gives us the best of Android in a very Windows-like experience.
https://www.pcworld.com/article/3295863/android/the-galaxy-tab-s4-is-a-great-productivity-machine-precisely-because-it-s-an-android-tablet.html
* Galaxy Tab S4 * $650 for the Tab S4 itself * Remove non-product link