The idea in the article is to make wrong code look wrong, so it's even more important to make it easier for programmers to check code visually for errors in wea

The idea in the article is to make wrong code look wrong, so it's even more important to make it easier for programmers to check code visually for errors in weakly typed languages such as C, where wrong code can easily get past the compiler. Even in strongly typed languages such as Haskell or Ada, it's still a good idea as it's useful self-documentation, and it also means you're less likely to get compilation errors.