Warn about using the GC

[claptrap]

On Sunday, 14 January 2024 at 12:29:26 UTC, Richard (Rikki) 
Andrew Cattermole wrote:
> On 15/01/2024 1:21 AM, claptrap wrote:
>> Nobody who uses @nogc is complaining about it. The people who 
>> are complaining are people who don't use it, they are 
>> complaining because it puts extra burden on them to support 
>> it. Or it's causing fragmentation. (Thats my impression anyway)
>
> I have over 100k LOC annotated with ``@nogc``. That is also 
> -betterC.
>
> I am complaining.
>
> I also want contract invalidation to help make the transition 
> for callbacks much more seemless to remove the perceived 
> fragmentation.

I actually dont know what that means.