In Safari, it seems like snapback is gone, as well as a drop down menu where you can select your recent searches. Also to switch search engines, you now need to open up the Preferences window. Maybe it's habit, but I liked it the way it was. Each time I go to search I find myself typing command L (highlight the URL bar) and then tab (highlight the search field). I know that's a habit I'll get over, but I do miss the snapback and recent searches feature. I would often repeat a search later in the day I had done earlier on. These don't strike me as legacy features in need of deprecation.