Open RAN is the separation of software functionality from the underlying hardware. This is called “disaggregation.” It is also the process of defining functional blocks in the network and clearly and precisely specifying the interfaces between those functional blocks. Most who study such things believe it to be true. But before we break out the Champaign, we should be a bit more circumspect and evaluate the threats to Open RAN. What might prevent Open RAN from reaching its potential?