Huh? All of the modern web frameworks let you delegate a component to a team and use it. What does react do here thats special?

Honestly, if anything I find react's modularity story much weaker than the competition. In react there's no page-wide state and the story around styling components with CSS is a huge mess.

In comparison, Svelte components feel much more modular & self contained because the styles are embedded with the component in a standard way.