The All Apps screen in Windows 8 was vital, yet kind of broken. To find it, you had to right-click in the modern Start screen and click the All Apps icon in the corner—and it didn't do a great job of sorting files.
With Windows 8.1, you can find the screen by swiping up or by clicking a new arrow in the Start screen, or by using the aforementioned (optional) Start button tweak. The All Apps screen packs many new sorting options—including the ability to show desktop apps first.
Even better, Windows 8.1 makes it easier to manage your modern apps. A new 'Search and Apps' section in the PC Settings menu lets you see how much space each program consumes, and it presents a single interface for uninstalling apps in bulk.