32GB might be somewhat excessive for mainstream developer laptops, but 16GB is not. A pair of VMs (for various MSIE versions, isolated dev environments, ...), an emulator or two (Android, iOS, …), 2-3 browsers open (with many tabs in at least one of them) and an IDE and you've blown way above 8GB working set without working on any big dataset.

I'm currently on an 8GB machine and regularly have to pare down my working set to avoid swapping.