Just to add to the general consensus, the only sure-fire OWC I can think of is Cru Classe Bordeaux.
Beyond that, it seems to be what the producer has in mind. In Barolo, I know Elvio Cogno Ravera (and cuvees above) comes in an OWC, and the Castello di Verduno Barolo Monvigliero comes in one, but the Alessandria Monvigliero doesn’t. The LRA 890 Gran Reserva comes in one (and a very stylish one at that too!) but the 904 Gran Reserva comes in a very flimsy cardboard one. Go figure
I wonder if it has to do with whether they perceive that the end customer is more likely to buy by the bottle or the case. I imagine the extra cost of the wooden box is only really justified by the end customer perception. Dealers who simply unpack the bottles and put them on shelves will not really care and in fact probably prefer cardboard boxes. So it only really has a marketing impact when the final customer buys a case rather than individual bottles.
Rubbish photo but I was impressed with the velvet rope handles. A nice and tactile splash of colour. Goodness knows when I will open one of them as the only person in the house who imbibes presently (tea totaller wife and teenage kids; family far away etc).