An important person missing from the article is Marcia Lucas, George's first wife. She was hugely influential in the development of the background for eps IV & V, and many people think her departure was where the mythos lost its integrity. E.G.: http://www.news.com.au/finance/business/media/the-secret-wea...
Giving credit to Lucas. But it's pretty obvious that SW was a recipe of pretty staggering ingredients. From pictures to music, design, even the sound engineering. Everything was pretty unique and succeeded when there were thousands of way they could have failed. That makes SW even more special in my mind, a really serendipity gem of these times.