Given the incredibly long wait (Ten Years!) and the fact it's only at the CAD stage (Still! Again!), it's unsurprising that few have bothered to register a pre-order for the WC.
But if there is a market for any steam-era loco in N, it would surely be for this one. As other makers would likely have proved by now, had Dapol not been squatting on this project for so long.