The article mentions that the hexagonical packing had been suggested starting from 2007, and it is essentially used in practice[1], but not with quite the same

The article mentions that the hexagonical packing had been suggested starting from 2007, and it is essentially used in practice[1], but not with quite the same emphasis on "packing" as the OP post. They also promoters of the 2007-hexagon also mention the privacy issue as their main guess at why nobody has used their seating. [1] http://www.smh.com.au/news/news/ba-adds-luxury-touch/2007/09/03/1188783131515.html http://www.smh.com.au/news/news/ba-adds-luxury-touch/2007/09...