You're not wrong. By simply making data immutable and just using function application you achieve something that's not too far off from function composition. I

You're not wrong. By simply making data immutable and just using function application you achieve something that's not too far off from function composition. I mostly advocate point free style for educational purposes and I believe in the end it doesn't matter too much whether you use one style or the other. I talk about the isomorphism briefly here: https://news.ycombinator.com/item?id=22299297 https://news.ycombinator.com/item?id=22299297 As to why I advocate the point free style for educational purposes and why I believe immutability is just buzz that hinders true understanding of why function composition is fundamental to FP I get into that here: https://news.ycombinator.com/item?id=22292105 https://news.ycombinator.com/item?id=22292105