Yes, "at its core" being the center of the post. Are you ready to read it now?
You might want to read up on the concept of Architectural Mismatch.
https://repository.upenn.edu/library_papers/68/
https://rd.springer.com/content/pdf/10.1007/978-3-540-92698-...
Fundamentally an application can be written to have at it’s core, a single, stateless pure function, behold!