From the D Blog: Crafting Self-Evident Code in D

[Dom DiSc]

On Tuesday, 3 October 2023 at 10:39:19 UTC, matheus wrote:
> I the first example "e" is receiving two arguments. While in 
> the latter "d" is being receiving whatever "c" returns and "3".

That's the point. In UFCS it is immediately obvious which 
function receives the 3, while with all the parenthesis it takes 
some time and concentration to find out, and getting it wrong is 
quiet easy.