Personally I only work on small to medium sized projects where I tend to be one of only a small number of developers. I prefer Sublime's super fast speed and use a few select plugins that are stable and boost my productivity.
I could see that in heavy enterprise environments with many developers the ability of PHPStorm would be beneficial when you're navigating a large codebase (many namespaces, larger methods, refactoring work etc).
As part of your learning invest time in learning:
- the keyboard shortcuts
- the command palette
- the goto bar (or equivalent in your app of choice)
Drill those features into your muscle memory! I can switch between different views, move files between views, jump to points on the page ... all without the mouse (like a Vim user!)
Typically I have no menu bar visible, just my two code editing panes. No minimap. No line numbers (they are in the status bar and I have CTRL+G to jump to a line).
Works pretty good for me.