We recently noticed that the Cart page styles were poor for customers with screen widths between 768 px and 1000 px. For those customers, products added to the cart had some text elements overlapping the right side menu.
(The cart was fully functional, but it made for a bad user experience.)
Therefore, the right side menu has been removed from the Cart page, and the cart width increased to 100% of the screen width.
One other benefit of this is that the product description in the cart is much more readable with its column width increased.
