I don’t know. For me, these are some rules of thumb for a successful UI design: 1) If you don’t need some UI element or feature right now, it doesn’t stay in y

I don’t know. For me, these are some rules of thumb for a successful UI design: 1) If you don’t need some UI element or feature right now, it doesn’t stay in your way; 2) Still, it remains easily discoverable. Auto-hiding scrollbars are a perfect examples of successful application of this rule. I like them. Apple are the experts along these lines: nearly everybody else either exposes all knobs and controls as the authors of this article advocate (it creates visual clutter), or keeps power features undiscoverable, relying on documentation and keyboard shortcuts (as UI minimalists advocate). The truth is in the middle.