> Don't all of those have two-way data binding? No they don't. > I think the point is that Facebook found it doesn't actually work well, at least for their us

> Don't all of those have two-way data binding? No they don't. > I think the point is that Facebook found it doesn't actually work well, at least for their use cases. They found a recurring set of bugs caused by two-way data flow, and built a framework to alleviate it. But MVC doesn't mean two-way data flow.