Talking about VS for Windows, that's the maximum footprint of the VS main process. If you use one of the WP8/W10M/Android emulators, then you need an additional

Talking about VS for Windows, that's the maximum footprint of the VS main process. If you use one of the WP8/W10M/Android emulators, then you need an additional 1/2/3 GB for the VM (plus overhead). Throw in some browser tabs, git (in VS15 it will be in its own process instead of eating up the main process' memory), some .NET Native/LLVM, the OS itself and you'll find that having 16 GB will give you quite some comfort