Yeah, we specifically built Redux Toolkit around Immer from the very first prototype that I wrote.

I had catalogued _dozens_ of immutable update libs between 2015-2018, and Immer is simply superior to all of them.

Which is why Immer is a non-negotiable part of RTK, and something we specifically tell everyone they should be using with Redux:

- https://redux.js.org/style-guide/#use-immer-for-writing-immu...

- https://redux-toolkit.js.org/usage/immer-reducers

(in fact, I recently got quoted on the top of the Immer docs with a tweet I wrote saying how awesome Immer is :) https://immerjs.github.io/immer/ )