User blog comment:DaNASCAT/Technical Update: March 17, 2015/@comment-23989026-20150317224224/@comment-5558012-20150318141804

"We decided to get rid of it completely to avoid having two different styles to maintain."
 * Yes! Venus's navigation was the biggest problem (outside some layout issues with infoboxes as a result of the recent activity box) I had with the new design. I hope the navigation stays the same.

"Moving the On the Wiki tab from first until last was the one truly positive thing the Venus prototype had going for it."
 * Personally I disagree. I like using "Random page" and having it at the end is one extra step to accessing it as it wouldn't be displayed by default.