Safari tabs can be moved

This morning I made a small click and drag mistake on Safari and found two tab features I was not aware of.

The first feature is that you can click-and-drag a tab off the tab bar and create a new window from the tab.

The second feature is that you can do click-and-drag a tab off the tab bar onto another tab bar.

Up to now the only thing I knew about tabs was that you could reorder them.