What are the real advantages that D offers in multithreading?

[cym13 via Digitalmars-d]

On Thursday, 28 January 2016 at 11:53:48 UTC, Russel Winder wrote:
> It should be pointed out that anyone using the synchronized 
> keyword anywhere in Java code is doing concurrent and parallel 
> programming wrong. If they are using synchronized in single 
> threaded programming well, then…
>
> [...]

I have seen you talk about this before and I too would love you 
to elaborate on the subject.