GC/nogc status in docs

[Ogi]

On Thursday, 9 July 2020 at 12:55:45 UTC, aberba wrote:
> Has there been any consideration on tagging Phobos function as 
> either GC or no-GC depending on how they behave for general 
> awareness when reading the docs?
>
> I'm thinking it could be useful to know what you get.

I wonder how much of Phobos is not @nogc simply because of the 
use of exceptions. Walter had some ideas that would allow 
exceptions to work without GC. Is there any progress?