'Functional Style' is better articulated as 'bits of code with clear functionality and no dependencies. Hopefully without leaky abstractions. Or sometimes what

'Functional Style' is better articulated as 'bits of code with clear functionality and no dependencies. Hopefully without leaky abstractions. Or sometimes what we refer to as a 'Library'. The decoupling provides greater resiliency to change and thus doesn't add geometrically to the complexity of the code base, rather just linearly.