Well I don't need 32GB RAM, but there are scenarios where it could come handy e.g. OpenEXR 32bit Image editing, Rendering Big Images with e.g. Autodesk Maya, Autocad Drawings of complex technical Objects, PSD files with many many layers.There are people who do, regardless of what OP does.
The other thing is that these devices are awfully expensive. You're buying them for the specs you think you'll over the next 4-8 years, not for the resources you need today.
The last thing you want after spending $3000-$4000 on a laptop is to find that in 2-3 years, it's being bottlenecked by something like RAM.
I do think that as software demands are increasing at an ever slower rate, you should be able to get 8 years from a new high-end laptop today.
But then i7 is the wrong choice, these people need Xeon+Quadro Graphics like: http://www8.hp.com/us/en/workstations/zbook-studio.html