Use the right tool for the job. In general I think you can write most frontend and backend apps functionally, but not per se with category theory. I think there’s a lot of space between sprinkling (just using map and reduce) and going full mathematical :)
Functions as first class citizens and immutability, gets you a long way.
E.g React lends itself well for functional frontend too, also works with f#/fable.
Perhaps some interesting reads for functional domain modeling:
Thanks both seem to be an interesting read bookmarked.
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