"Moderately interactive interfaces" describes most web applications - stuff like gmail, airbnb, facebook, youtube, reddit, etc. Even for things like Mapbox or Observable that require a high performance core, React is the best choice for building the surrounding chrome.
Whether HTML/CSS/DOM was a good technology to use for building these types of applications is another question but we're stuck with it now either way.
Whether HTML/CSS/DOM was a good technology to use for building these types of applications is another question but we're stuck with it now either way.