[mortehu]

> All UI's are graphs at their heart

A bit of an overstatement, considering /bin/rm, Amazon Echo, NFC (e.g. Apple Pay), car pedals, shake gestures (e.g. camera activation on Moto X), and keyboard shortcuts (e.g. Win-L to lock the computer).

I know, you were probably talking about GUIs specifically, but how you interact with a GUI is not really covered by Tufte. I second the recommendation for The Humane Interface for that.

[Normal_gaussian]

Yes I'll give you that

I have essentially written four mini-essays exploring the topic today in attempts to reply to your message. I'll suffice with:

"All UI's are communicators of quantitative information at heart. And many are shit"