It is true that the second screen is controlled by the current app, but I don’t think there are any other limitations. There are absolutely keyboard shortcuts.

It is true that the second screen is controlled by the current app, but I don’t think there are any other limitations. There are absolutely keyboard shortcuts. Obviously this is up to developers, a lot of apps like Things, Shapr3d etc have excellent shortcut support. It takes a while to optimise UX in a new interface paradigm, amd again this is obviously up to developers. There are few technical limitations. And considering how little Excel on the PC has changed over the last 20 years, we should be happy. And look at Numbers and Pages on iPad, really good UX.