I'm still baffled as to how using React for static sites like this makes any kind of sense whatsoever
Because Gatsby is not just a "static site builder", by leveraging React and Graphql you can build powerful web apps while taking advantage of static rendering and using JAMstack approach if you like.
That doesn't really answer my question. Your answer is akin to saying you can use a Cray supercomputer to add 1+1 because it's not just a calculating machine, it can also model planetary weather systems.
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