Why is vibe.d json serializer/deserializer so complex?

[Adam D. Ruppe]

On Saturday, 31 October 2020 at 22:42:20 UTC, James Blachly wrote:
> be the nearest analog facility in D -- supposing we could agree 
> on a standard API -- to facilitate pluggable serializers?

interfaces?

could even be informal interfaces where you just use the same 
function names

so something in the middle, like how isInputRange works.