Oh, because people are regularly installing the 7.8GB Xcode update?

Aside from the fact that I doubt anyone downloads that many apps, from my understanding Apple TV makes you use on-demand resources for anything above 4GB. That means that old resources automatically get flushed out, so the actual benefit of those extra 32GB is more of caching-feeling behavior.

I use Infuse with my NAS and it uses GBs of local storage for caching previews and thumbnails.

There are quite a few storage hungry apps least of all the screen savers.