Hidden menu items in Adobe Photoshop

Adobe's prompt to make menu items visableToday I needed to complete a simple Photoshop exercise: Trim the background from a number of bitmap files. However...Adobe has decided to 'hide' the Trim function from the image menu and replace it (along with eight other menu items) with a 'Show All Menu Items" prompt.

Why has Adobe done this? I'm certainly scratching around for reasons why. It seems completely contrary to a consistent product experience.