This was a concept that tried to move the decision of what the flow would be to the creation step. This in theory could simplify details drawers further down, and allow for easier development process.
However this is moving complexity to the user and making it difficult to explore and change a flow as you are building. Again leading to a rigid and unforgiving user experience.
Since we can derive this type from the details of how the user configures the flow this was eventually dropped. Asking the user to categorize a flow before they have made it is unnecessary and tedious.