Why the @ in @safe? & UDAs

[Timon Gehr]

On 11/10/2013 05:39 PM, Andrei Alexandrescu wrote:
> On 11/9/13 1:27 AM, SomeDude wrote:
>> I would add that constant breaking changes make the language unfit for
>> industrial usage in the long term.
>> Let's remember that D is being pushed in production by Andrei at
>> Facebook. If the language breaks everything at each release, there is no
>> way Facebook or any other company for that matter is going to bet a dime
>> on it.
>
> Agreed with qualifications. We at Facebook are well aware that bumping
> the gcc release will inevitably cause breakages, and are able and
> willing to put up with them for the sake of the benefits. This of course
> is guided by the breakage/benefits ratio.
>
> Andrei
>

What about just shipping a fully automated fix-up tool when trivial but 
major breaking changes happen?