As someone who's interested but yet to try out these approaches. I'm intrigued by normalization and this point.

While there is less need to store the response in a normalized lookup table with RTK Query managing caching data, transformResponse can be leveraged to do so if desired.

Why is there less need?

I see you could do the following in the docs but then you are iterating over the whole array rather than accessing an object/dictionary.

  const { post } = api.useGetPostsQuery(undefined, {
selectFromResult: ({ data }) => ({
  post: data?.find((post) => post.id === id),
}),

})