We're in agreement on all these specific niches the iPad is supposed to fill.
On how much it's filling them correctly, outside of people's feelings we only have a few indicators; I'd say this few years' steadily declining sales could be the best summary ?
Listen dude all I'm saying is that editing text is pretty good on an iPad if you have a keyboard for it. That's it. I don't know what broader market trends or product design flaws are being revealed by sales numbers or anything like that, that's not the conversation I'm having.
people who want to use their iPad primarily for writing will want a keyboard + touchpad
people who want to use their iPad primarily for drawing probably won't want a keyboard or touchpad
I don't know why someone would choose an iPad for drawing rather than a MobileStudio Pro, you'd have to ask someone who draws on an iPad.
Personally, my iPad is purely a video and reading device, so I'm not the target audience for either. I'm guessing you aren't either.