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