Well, then, obviously, demonstrably, whatever your intent is, isn't really taking off then, is it?
When I see that image, the field is dominated by upside down text, not "rotated" text. The legend on the side doesn't even enter my field of view to suggest that's what should be down with it. That's likely because it's viewed, on the screen, in vertical pages, vs in a book with facing pages.
In a book, it may well be more intuitive. But, again, demonstrably, in a PDF, not so much.
And, my iMac is pretty heavy and doesn't like being turned well.
In PDF form, you could rotate the page before you publish it.
Or, you could blow it up and have it span two pages if you have extra space in the book.
And, as for paper books -- yea, I pretty much don't buy them any more. Most of my reading is done on an iPad, and my shelves, rooms, and life are cluttered enough without bringing more in to it.
