Hmmm..Based on your suggestion and our previous discussion I am thinking of:
-) Make all graphs use their Local Blackboard by default without an option.
-) Add an optional “append” blackboard reference, which will append that referenced blackboard variables to the local blackboard variables.
-) Create an “AssetBlackboard” type which will be just an IBlackboard but a ScriptableObject instead of Component, thus you can choose to create and reference either depending on the situation.
As a result, variables will be possible to be either:
-) Local.
-) Scene reference.
-) Asset reference.