It is definitely an IE 11 thing (I am running Windows 7), and it is definitely intentional.
And it is incredibly aggravating.
Interesting that MS stopped participating in this thread a year ago.
It's not just related to the browser though. It's mostly apparent to me on apps. Every app i've used has a disappearing scrollbar and considering that it's an app based OS, it seems we're well and truly stuck with the disappearing scrollbars.
What's astonishing is that they must have known now for, certainly over a year, about this issue and how frustrating it is for their users but they're silent on the issue. They really don't give a stuff!
It's obvious that theyre just sitting on their hands hoping their p l e b customers will just get used to it.
Seems to me the bigger a company gets, the more remote from it's customers it gets.
If they lost a cent for every curse uttered by someone using disappearing scrollbars, even they would be bankrupt by now!