Domain-Driven Design is 20 years old. While many of the patterns are still present in modern development, some of the key underlying messages have got lost.

In Chapter 8 of the original DDD book, Eric Evans talks about making a big domain breakthrough after a long New York winter of refactoring on an inherited legacy codebase.

Eric's story emphasises the importance of models and modelling breakthroughs. I'd like to re-visit this story and show you how many of the insights are still highly relevant to modern software development... possibly even more so.