I found Rob Beschizza's thought [1] about the new iPad Pro insightful: "a very powerful machine, handicapped by iOS having no workflow".

Because of the sandboxed nature of iOS, and the current immaturity of the Files app/feature, it's hard and inconsistent how you can exchange files between apps on the iPad. As a result, you're still mostly stuck to using one app to do things in iOS. The workflow is still fragmented.

[1] https://boingboing.net/2018/11/06/ipad-pro-deemed-amazing-fo...