Personally I see it as similar to typed vs untyped languages. You can add typing...

hiatus 76 days ago | parent | context | favorite | on: NixOS is a good server OS, except when it isn't

Personally I see it as similar to typed vs untyped languages. You can add typing to untyped languages or you can just use a typed language. The language used shapes the structure and some are easier to reason about than others (to some people).