The stack is real and reminded me of Data-Context-Interaction https://dci.github.io/. Its inventor Trygve Reenskaug was arguing that this helps with building UIs and object models that are closer to how users think about the world (which should be related to product design.)
I like the knowledge stack, and the metaphor. this one is true "a small team one person might be doing most of this solo"
The stack reminds me of the Lean Product Playbook's stack by Dan Olsen.