There are no limitations on the node functionality in the current free Technology Preview.
Note also that many more node types are yet to be added. Currently there are many customized nodes for specific functions (Surface Layer, etc.), there are some more standardized and multi-purpose nodes (Power Fractal, etc.), and then there are many math-type operators in the Function Nodes. Additional generalized nodes such as "distance from object" will be implemented in the future.
- Oshyan