Sure there is, but the bang for the buck starts to trail off.
The time when more than 8GB of RAM becomes useful and starts paying for itself is when you’re running several resource-heavy applications simultaneously — especially high-end image or 4K+ video processing, CAD, or 3D modeling.
If you’re running applications like Premiere Pro, Photoshop, and After Effects side-by-side on a system with 8GB of RAM, things are going to start feeling sluggish. On a system with 16GB or more, this is no problem.
Having more than 8GB also comes in handy if you make extensive use of virtualization tools such as Microsoft Hyper-V or VMware Workstation, especially if you run multiple virtual machines simultaneously.
But remember, you’re going to be paying for that RAM, and going from 8GB to 16GB and beyond is going to start pumping up the price.