When selecting "Reveal Hidden Elements", all hidden elements are shown, even hidden elements in linked Revit files. This is sometimes ok, but when there are a lot of links loaded the process can be very slow, and very messy. This makes it really hard to find the element you are looking to unhide.
If there was a button for "Reveal Hidden Elements - Without Links" that would mean that only elements hidden in the current Revit file would be displayed, improving efficiency by increasing speed and clarity.