If that many programmers don't understand the JMM, it's because that many programmers haven't looked at it. It is the key to reasoning about Java concurrency.

If that many programmers don't understand the JMM, it's because that many programmers haven't looked at it. It is the key to reasoning about Java concurrency. Any other model that is not the JMM is flat out wrong. It is virtually impossible to write correct concurrent Java without understanding the memory model.