I didn’t take it that way, I took the “pretty pictures” to be mocking the OSI model’s more ambiguous layers.

Reads to me like the design of HTTP combined 5, 6, and 7 into one.

Except now we have session and application protocols built on top of HTTP using additional software, which according to OSI would be additional layers. You can in a lot of cases use the standard to achieve this, but frequently enough we don’t.