Vertical Tabs

This has nothing to do with books. It just interests me. You have been warned and can stop reading if you’re not interested.

I use Edge as a browser (mostly; I still use Chrome for Google maps and translate). Recently, they added a new feature: vertical tabs. So, questions:

Is anyone using them?Why?What’s the point?

The last one may need clarification. I tried out vertical tabs. For those unaware, this takes the tabs out of the title bar and puts them in a vertical strip down the right side of the window. So, what this does is make the viewing window for your web page smaller. As far as I can tell, you gain nothing. Can anyone tell me why you would want to use this feature? I just can’t see it. With the tabs in the title bar they effectively take up no space. Is it to do with wanting several hundred tabs open at once? Help!