CompStrm is Robust!

Having some experience now with various failure modes, overall I am quite happy.

Much of the source of this robustness is because deletion and cleanup of datastructures is not under application control, but rather is governed by the metadata associated with various properties. This means that, when an application bug makes some odd structures which the application logic is not prepared to handle, cleaning up the mess is just a de command away.

In general, its much easier to get the metadata declarations correct than to debug the (often dynamic) business logic.