Exactly. Integrating many apps is something we do as well. We have a large application that handles roughly 500 different domain classes (just scan through http

Exactly. Integrating many apps is something we do as well. We have a large application that handles roughly 500 different domain classes (just scan through https://apidocs.mendix.com/modelsdk/latest/ https://apidocs.mendix.com/modelsdk/latest/ to see how vast that is). This approach enables our partners to write plugins that are not only simple to write, because they can just work with 'plain' javascript classes and arrays (and don't need to learn the whole, for example, redux architecture), but which are also really easy to integrate in our visual tools. Our UI stays always efficiently in sync with whatever mutations plugins make. In an architecture with explicit subscriptions, events or selectors this would be a lot harder to achieve.