not the parent, but for me it's not having to think about what I run concurrently. A browser instance with many tabs, VMs running and editing large files in e.g. Photoshop and you'll easily go over 16 GB. If you regularly compile large projects or develop memory intensive apps you might want more. A few people I know were very happy about new Intel desktop CPUs supporting 64 GB instead of only 32 (and get annoyed every time they try to buy a new laptop and discover that 32 GB still is hard to get)