Thoughts on menu system
Keeping menus open can be an important indication of where a person is in a site. The problem is that in Drupal that usually means putting every page into the menu. At work we have so overloaded our menu system before that we had to up our php memory limit. Not saying it wasn't a full menu, but it was lower than I would like. Because of that, I tend to be hesitant on anything that requires putting lots of items into menus.