Seems like BS1363 has the same status in New Zealand as Schuko (CEE 7/7) has in Ireland. i.e. it's not abandoned, just never used.

BS1363 with 32A rings are perfectly legal here in Ireland but, oddly enough it's just appears not to have really caught on as a way of doing things. The vast majority of installations being based around 16Amp fused or 20Amp MCB radials feeding BS1363 socket outlets.

Works quite nicely as a system.