Yeah no, we didn’t invent things like react to write a password input, we did because as soon as you have more than one event trying to edit one part of the page you’re in hell with backbone. So you add marionette, and a store object, and then there is magic bindings with performance problems or thrashing, and you debug that, and then you… That’s how we got here. This example is about 1/4th the minimum size needed to study the issue. You don't need hundreds of components, you need a single piece of state that is updated three ways to start seeing the pain.