DIP74 - where is at?

[Freddy via Digitalmars-d]

On Sunday, 11 October 2015 at 05:52:45 UTC, Freddy wrote:
> Speaking of DIP74 can't we just wrap a class in a struct with 
> use reference counting with and use alias this?

Also how will DIP74 work with incremental compilation?
---
extern (D) class RcClass;

void func(RcClass a)
{
     //opps
     auto b = a;
     return;
}
---