Mobile Phones Are Different From Desktops

The team realized people are going to be running apps in mobile phones in a different way than we do on desktops. This quick switch really only works if multiple programs can reside in memory at the same time. The operating system will automatically start killing stuff in the background until it has enough memory for the thing that just launched. So you're always in a state where your application may just get killed and then the next time the user goes back to it, it may take a little bit longer to launch because of restarting.