The first issue which many people experience as it might not be convenient for them to adapt, is when the last tab is closed, it doesn't close the whole window rather it launches a new tab. This feature is highly unlikable by many as I have reviewed on previous forums, but also required by some.
If people need this feature less and most do not, then it should be either fixed as request or should have an option to change the settings.
Close Window when last tab is dragged to another window.
Anther similar behavior is when the last tab of a window is dragged to another window ( existing or new created window ), the window doesn't close rather it launches a new tab in the same old window.
Please comment below with your opinion and vote for this with a + or -