In addition to the double-click (on-demand) Node browser it could be helpful to have separate always open Node browser windows where you can browse/up down categories. From these you could also drag-n-drop a node onto a patch.
It would aid in having an overview of a category of nodes visible related to what you are working on. If you are for example building a GUI with Elementa or patching Skia graphics you could have those categories open so you can both see what’s available and more quickly be able to add nodes without having to browse categories.
A related suggestion (if not already implemented, just that I’m ignorant/new to gamma) would be to be able to toggle the double click Node browser storing it’s category state between invocations.