Not just this. Modularity is the main insight as well. The reason why oop doesn’t work is because methods can’t be broken down. Your atom is oop is literally a

Not just this. Modularity is the main insight as well. The reason why oop doesn’t work is because methods can’t be broken down. Your atom is oop is literally a collection of methods tied to mutating state. You cannot break down that collection further. In pure fp. You can break your function down into the smallest computational unit possible. This is what prevents technical debt of the architectural nature as you can rewrite your code as simply recomposing your modular logic.