Great question! We actually looked at using the workflow abstraction for batch processing in our runner, but ultimately didn't because it was still in alpha (we use the dataset API for batch flows).
I think one area where we differ is our focus on streaming processing which I don't think is well supported with the workflow abstraction, and also having more resource management / use case driven IO.
I think one area where we differ is our focus on streaming processing which I don't think is well supported with the workflow abstraction, and also having more resource management / use case driven IO.