C++ interop - what to do about long and unsigned long?

[Sean Kelly via Digitalmars-d]

On Thursday, 11 September 2014 at 00:29:37 UTC, Andrei 
Alexandrescu wrote:
> On 9/10/14, 4:16 PM, bachmeier wrote:
>
>> Clearly Walter and everyone should work on whatever they think 
>> is important. I hope your statement doesn't imply that all 
>> development effort is going to be put into C++ compatibility.
>
> Ideally it would.

Is C++ interop really that important or is it another one of 
those "if D had this, *then* I would use it!" dismissals.  C 
interop is clearly crucial.  Operating system interfaces are 
written in C, and not being able to call C functions is hugely 
limiting.  But C++?  I honestly can't envision a situation where 
I would actually care about C++ interop.  Is this truly a blocker 
for some people?  Like an actual, honest blocker and not just a 
false flag?