Inactive Recognized Developer
No, MS made it so that's always on. I think it's because people got confused when the jump lists started suddenly appearing after they installed some apps.
Two relevant points:
1) Why have a smartphone if you're not installing any apps or even adding things like multiple email accounts?
2) You realize you can jump to the bottom of the list with two taps, right? It's a *jump* list, not just an index.