Make 'closing the last open tab in a window' and 'closing the window' separate

Sometimes I want to close the only open tab in a Named Window without losing the window.

Currently, that isn’t an option. Closing the tab also closes the window (along with its ‘Name’).

By contrast, when one ‘opens’ a new window a blank tab is automatically inserted in the new window.

Perhaps the same could be added when closing a window, as a user option/preference – i.e., if the user’s general preference when closing the last open tab in a window is to retain the window, a blank tab could be inserted in the same way as when a new window is opened.