It just is. Thumb typing in portrait on the 12.9 is awful. Screen is too top heavy in portrait mode. Multitasking on the iPad Pro is really only realistic in landscape mode. To me the 12.9 is a landscape tablet, and if it's in landscape I want the keyboard on it. Of all the times I used a 12.9" iPad Pro, not once did I ever want to use it off of the keyboard unless I was signing something with the pencil.Why? It's only the size of an A4 paper
You are never going to sit the tablet down on a desk or in your lap and you are never going to web surf or write an e-mail? Feels very dogmatic and missing the point of the iPad, but of course if you don't plan on using a keyboard, you don't. What can I say?
Anyway, the iPad Pro 12.9 is an awkward tablet for many people, which pushes it towards landscape/keyboard usage on a lap/desk. Again, YMMV.
Of course I'll write some emails and sure I'll surf the web, but I think having a keyboard doesn't make sense in my case and I honestly don't want it. Maybe in the future I'll get a mechanical one and a desk stand for more serious editing tasks, we'll see.
I got it to use it for what it is, a tablet. Maybe I'll change my mind, it may be.
I’m a touch typist on Keyboard. If you force yourself and type a lot, you can really function quite well on the display keyboard you just have to unlearn resting your fingers on the display. I wouldn’t want to type for hours like that, but answering an email here and there, typing notes and using the type ahead word suggestions you can really get by.
Of course it depends on ones purpose of usage for the device. I have a blue tooth keyboard for when I have typing tasks that take most of the day. And, I can use that keyboard for my Mac Mini, or any other blue tooth device in the house.
A single use keyboard, however, for 1/3 of the price of the iPad, doesn’t make much since for me.