[briantakita]

Since reactivity is not baked into Javascript. Adding reactivity is going to add abstraction overhead. It's meant to be used if it's needed. Not necessarily a default way to work with state.

In my experience, the big benefit is the ability to make reactive state modular. In an imperative style, additional state is needed to track changes. Modularity is achieved using abstraction. Only use when needed.

> Sounds like they want premature memoization

It's a balance to present a simple example that is applicable. Cases where reactivity have a clear benefit tend to be more complex examples. Which is more difficult to demonstrate than a simple, less applicable example.