Dynamic Graph Variables
Requesting the ability for nodes to be capable of permanently changing a graph variable so that the next node that reads the same variable sees those changes. These variables would likely reset to their "default" values when the graph starts.
If this is something that would cost in performance, maybe a toggle that converts a standard graph variable into a dynamic one.
A big plus would be communication between graphs. For example, if we expose a dynamic variable of a sub-graph, we can control its starting value and read its final value after it exits.