I get the argument the author is making. React is a Javascript framework, but Gatsby is a React framework. So you have a situation where you have a framework fo

I get the argument the author is making. React is a Javascript framework, but Gatsby is a React framework. So you have a situation where you have a framework for a framework. Having worked with both, React isn't just an "opinionated way of writing JS", it uses Javascript under the hood but there's a ton it does uniquely, that is there is no JS equivalent, this is a thing that only React has (hooks, context, etc).