I can't really speak for the Kea library directly, but the patterns used in React/Redux land are most valuable in large, evolving projects spanning many develop

I can't really speak for the Kea library directly, but the patterns used in React/Redux land are most valuable in large, evolving projects spanning many developers. Such benefits are therefore subtle and difficult to illustrate with concise examples. It's easy to dismiss these things as "buzzword" soup when the examples are trivial for illustrative purposes, but having real experience employing these patterns at scale is extremely valuable in the real world.