This guy presents an opinion on "a compile-time hierarchy of encapsulation that matches the domain model" and what are the appropriate ways of drawing the encapsulation boundaries in software today. This is pretty deep. The talk is based on not-very-well-known details of the history of OOP paradigm and related programming languages. As well as the challenging problems that were originally successfully solved on the crappy computers of the 1960s. Somehow reminds me of the completely unrelated but famous "billion dollar mistake" of the NULL pointer: the pattern, which was probably good for a single problem Hoare was working on at that time, but unfortunately became a mainstream solution for inappropriate problems. #computerscience #softwareengineering #history