Well this seems like refreshing honesty. It makes a change from the usual "why paradigm/technology/methodology sucks!!" tech people love to write, which upon cl

Well this seems like refreshing honesty. It makes a change from the usual "why paradigm/technology/methodology sucks!!" tech people love to write, which upon closer inspection is almost always a reflection of their own shortcomings. As well as using event-sourcing, the application has a Ports-and-Adapters (aka “hexagonal”) architecture. Loading the current state of an entity was hidden from the application logic behind a Port interface that was implemented by an Adapter class. My colleague, Ivan Sanchez, was able to switch the app over to calculating an entity’s current state from its event history and treating persistent entity state as a read through cache (as described above) in about one hour. Ports and Adapters is great, though I found it hard to sink my teeth into as it has a thousand different names. But regardless, I am never doing n-layer architecture again if I can help it.