thanks for this article. I would like to point you to one of mine articles that introduces Khipu, an architecture written in the "Declarative Domain Paradigm". It uses ideas from OOP and FP — in fact DDP is a meta-paradigm: it is able to eatable FP and OOP: https://blog.devgenius.io/khipu-rapid-and-sustainable-software-creation-in-swift-using-engineering-and-science-principles-312a933cce57?source=friends_link&sk=8359f48cc06571e53de156db8cbc005c.

To decode behaviour it uses nested and annotated enums, which can be designed to resemble spoken English, like alter(light, .by(.turning(.it(.on))))