Why D is not popular enough?

[bitwise via Digitalmars-d]

On Tuesday, 2 August 2016 at 07:50:29 UTC, ketmar wrote:
> On Monday, 1 August 2016 at 19:33:48 UTC, bitwise wrote:
>> 'scope' keyword, for example, is legal in D syntax, but 
>> doesn't actually do anything.
>
> sorry, but you are wrong here. of course, it does HAVE effect.
>
>   `void foo (scope delegate () boo)`
>
> this means that compiler should not allocate a closure for 
> delegate, as `foo` is promising that it will not store `boo` 
> anywhere.
>
>   `scope a = new A();`
>
> this does what you think it does, althru it is deprecated in 
> favor of `scoped!` template.

I know about these cases, but didn't bother mentioning them, as 
they are outliers. Also, they do not make my point any less valid.

The following code compiles without errors(outputs 1):

class Foo{
	int val;
	this(){ val = 1; }
}
Foo x;
void bar(scope Foo foo) {
	x = foo;
}
void main() {
     bar(new Foo());
     writeln(x.val);
}


'scope' is clearly not functioning as advertised, as is the case 
for many aspects of D. Again, users shouldn't have to deal with 
this sort of thing. I doubt that anyone outside of would-be D 
contributors will continue to use the language beyond the point 
where they find a hole like this.

     Bit