1. Commercially available products for work flow management based on SAP and Oracle DB systems are very costly and many times costlier than the whole size of small and medium business enterprises.
Licensing issues and recurring costs stops small and medium business enterprises to stay away from work flow management revolution.
Commercially available Microsoft based technologies are not customizable as they never show their source code. And since one size doesn't fit all, similarly same product specification never serve any organizations needs 100%.
Microsoft based technologies have always been victim of virus and hackers due its architecture.