I'd like to weigh in from a keyboard-centric point of view.
I much prefer to use keyboard shortcuts for things I do often. And what I do most frequently of all, is to toggle the visibility of the sidebar, and control what it shows.
What we have, from the View menu:
- Show/hide sidebar: ⇧⌘L – good
- Show/hide bookmarks sidebar: ⌃⌘1
- Show/hide reading list sidebar: ⌃⌘2
But there is a quirk: The latter two act reasonably if either the sidebar is not visible or it does not show the desired contents, but otherwise, it just hides the sidebar, but keeps its contents, so it is once more there if I hit ⇧⌘L. What I would expect and desire is for the related contents to go away, but the sidebar to remain visible, as if I had hit the left arrow head at the top of the sidebar.
Failing that, I'd like a separate shortcut to revert the sidebar to its “original” state, by which I mean showing the vertical tab bar, if otherwise enabled, or else the little menu letting you show either the bookmarks of the reading list.
At first, I though the “Show/Hide vertical tabs sidebar” shortcut (⌃⌘V) was what I wanted, but that toggles the tab bar between vertical and horizontal, which is something different. I can hit it twice to get what I want, but that seems like a rather hacky workaround for something that should be easier.