This seems to be the hardest part with migration tools. The more they try to be "universal" (compatible with different providers, protocols, and configurations)

This seems to be the hardest part with migration tools. The more they try to be "universal" (compatible with different providers, protocols, and configurations), the more edge cases they have to handle, and that's where problems usually arise. Having a clear scope and an explicit indication of "this won't work here" is often more helpful than trying to support everything.