Just like QC does it, i tend to have the Library detached and expanded widely so I can read the node info comments. It tends to cover quite a bit of my composition when open. Be nice for Library to disappear when we hit "return" to insert a node or successfully drag a node from the Library to the canvas for both attached and detached versions.
I'd have a toggling flag in the View> Node Library menu with a check mark for when this option is activated (rather than in Preferences). We can make our own shortcuts if required that way.