Managing local styles would be a lot less tedious if option-clicking the disclosure triangles would open or close all of the nested folders contained in a folder. This is how disclosure triangles in layers list works. They should work the same way.
Without that feature, I’m constantly having to manually close each one because Figma decides sometimes that they should all be open.
Maybe there’s a way to make it work now. If there is, I couldn’t find it.