What's the issue(s) with scope vars?

[Nick Sabalausky via Digitalmars-d]

On 5/22/2014 3:31 PM, Dicebot wrote:
> On Thursday, 22 May 2014 at 19:08:53 UTC, Nick Sabalausky wrote:
>> I know there's been a lot of chatter about scope vars needing work,
>> what exactly is the deal with that? Isn't there a lib version of
>> scoped? Are there current problems with that?
>
> You speak about scope storage class (aka scope classes as in D1). It has
> been deprecated and replaced by Phobos scoped.
>
> Recent chatter is about scope type qualifier which is supposed to
> prohibit escaping references to variable making it only available in
> current and nested scopes. There are many possible applications for that
> - safe casting away for shared, safe rvalue references, efficient
> reference counting and so on. It is currently present in the language
> but has no actual implementation, being effectively a NO-OP.

Is phobos scoped at least good enough for real-world use in the meantime?

Also, is this unimplemented scope type qualifier you speak of going to 
basically replace phobos scoped?