In our platform, we just let the developer call a function manually after updating the state of a tool. So it is event-driven reactive changes.

Yes, shockingly, we don't save those keystrokes, but we also don't have the elaborate dirty checking. The developer of a component is extremely likely to make sure during development that the update to a state has updated the view. Of course, you could just hook up React or VDOM or mirthril and it's totally complementary to what we do.