I don&#x27;t know if there is a formal taxonomy of these things, but I tend break down messaging passing architectures along the what&#x2F;how axes.<p>So you can have events or commands being sent in your messaging based architecture as the what.<p>Log based architectures really speak to the how.  That is, the medium for message exchange is a durable log.<p>But like you said, in the real world they tend to be hybrids across all these lines.