Usability of "allMembers and derivedMembers traits now only return visible symbols"

[David Nadlinger via Digitalmars-d]

On Sunday, 4 September 2016 at 12:37:47 UTC, David Nadlinger 
wrote:
> Do we, though? It's easy to state a general claim like this, 
> but I find it hard to actually justify.

(And to pre-empt the collective freak-out, note that this 
statement is coming from somebody who has done quite a bit of 
pioneering serialisation/meta-programming work. — David)