`in` no longer same as `const ref`

[Nordlöw via Digitalmars-d]

On Monday, 30 January 2017 at 00:26:27 UTC, Walter Bright wrote:
> On 1/29/2017 3:50 AM, Nordlöw wrote:
>> Why is `in` no longer the same as `const scope`?
>
> Because it was unchecked and largely unimplemented. I was 
> afraid that by checking it, too much code would break.

Will we make them equal in the long run? So much shorter to read.