Sorry, I meant to write disabling notebook tab close buttons.
I didn't even realize that option existed until now. I would guess users who do that, it is because they use the keybindings.
One downside to this is that you have to move the mouse further to click the menu button than before... A simpler solution to this pull would be to move the fixed commands above the notebook tab item list.
I was going to suggest doing that until I saw this PR for splitting it which seems nicer. I personally don't think it's a big deal that you move your mouse to a different location.
But we should also consider frequency of use - I would guess Close would be used more often than Open in New Window.
I would guess the large majority of users don't disable the tab close buttons and of those that do, don't use the menu to close tabs. Personally I don't think I've _ever_ used to item to close a single document from that menu, though I use all of the others often.
Closing a single document is not a drastic action.
Indeed, but it's more "drastic" than not closing any document.