To a first approximation, yes. There is some small cost for the workflow function itself, but as this doesn't wait on responses and only really executes the sid

To a first approximation, yes. There is some small cost for the workflow function itself, but as this doesn't wait on responses and only really executes the side effects, it is not that much. Especially, given that this has comparable semantics to the accurate mode (not the express mode) of StepFunctions (which is charged by number of state transitions and not super cheap).