edit: this explanation was for the pre-edited point: When the last file is closed, a new transient file is created automatically before when you closed all

edit: this explanation was for the pre-edited point: When the last file is closed, a new transient file is created automatically before when you closed all tabs you were left in this weird state where there was no buffer to type in until you created/opened a file. Now it behaves as if you'd just opened a fresh window, where you have a buffer that becomes an "untitled" tab the moment you type something.