The worst offence of this type I've come across is in JetBrains' latest crop of IDEs. In WebStorm, they completely removed the scrollbar in the code editor, an

The worst offence of this type I've come across is in JetBrains' latest crop of IDEs. In WebStorm, they completely removed the scrollbar in the code editor, and replaced it with this "hidden until you mouseover it" slider thing. That means you have no visual cue where you are in a document, scroll-wise. And no way to quickly grab the scrollbar with the mouse since you have to hover and wait on the right edge of the screen before you can see where you're headed. Making it worse, they have (normally) really useful gutter over there that displays colored bars describing the health of your code. Those are cool, but they now live on top of the scroll bar so even when its visible it's still pretty hard to find it. Compare that to their (awesome) ReSharper plugin for VS.NET that preserves the original scrollbar and adds that helpful gutter bar next to it. You can quickly see the health of your code AS WELL AS where you're scrolled in the document. Perfect. I filed a bug against WebStorm about this and had it immediately closed as "by design". Worse UI. Intentional. And not even a setting you can uncheck to fix it. I actually uninstalled my paid copy of WebStorm as a result. It'd be an awesome product, but all its advantages are wiped out by not being able to navigate around files at times when I have a mouse in my hand. One bad UI choice to turn a good IDE into shelfware.