Since Photoshop CS3 you have been able to customise what appears on the main drop-down menus in Photoshop. This allows users to de-clutter menus and just show the commands they use. This is especially useful for training purposes, as you can even highlight certain menu commands in colours in addition to hiding away confusing commands for people just learning Photoshop.
Complex, high resolution files can take a long time to open in Photoshop – but sometimes you just need to open it to check the file out or show it to someone… and as they say, time is money!