In earlier versions of RetroFE, this would indeed work, since menus were automatically assigned an index when created (0 for main menu, 1 for the next level, 2 for the level after that, etc.), but could only be animated at their own level. Since theme developers requested that they wanted to be able to animate the menus at any level, the automatic assignment remained, but the animation would always activate. That's why the menuIndex is used for the menu animations these days. It's more work to do it this way, and it requires a menu entry for any level you want to see a menu at, but it also allows you to e.g. show (part of) the main menu wheel, and even animate it, while walking through a collection's menu.