Three Unlikely Successful Features of D

[bearophile]

> There are a few features of D that turned out to be successful, 
> in spite of them being seemingly unimportant or diverging from 
> related consecrated approaches.
>
> What are your faves?

After thinking some time about this, I can't find one of them :-)
I see many useful/successful features in D, but none of them
seemed unimportant at first to me.

Maybe I am just strange, but very little of syntax and semantics
of a language is unimportant. In languages even unused features
(C trigraphs?) sometimes bite your bum, so they become important,
with negative value.

Bye,
bearophile