Both? The missing Escape was a hardware disaster, but unrealized potential and UI issues was a software one. Though not having multitouch is also hardware.

> and the volume would also appear in the old HUD on the screen, altogether feeling like different parts of the system weren’t aware of each other.

As it should: first, you can cover the slider with your finger, so the level reading becomes hidden. Second, why would you look at the slider instead of the screen where all the other useful information is?