Functional programming is definitely not easier to grasp, but it does make compositionality explicit. So the downside is that a single line of code can be dens

Functional programming is definitely not easier to grasp, but it does make compositionality explicit. So the downside is that a single line of code can be denser and less intuitive. The upside is that you can reason inductively over large bodies of code, treating Desired Properties for large things as following neatly from Desired Properties for small things.