Bloomberg has a steep learning curve but it's amazing once you've worked for it for a few months. I can access the most exotic functions or sub menus by just typing in a string of numbers. I don't think any other software allows you to already select menus on a page that hasn't even loaded yet. Changing anything is a huge annoyance for users.

There have been a few newer functions that don't allow accessing everything by number shortcut and they're certainly not the most favourite parts of the terminal.