Who knows what the figure could be?? I won’t be speculating, since I haven’t a clue. Sure, for a technology that’s still in the lab it will be low. But this tech hasn’t just been developed in the Lab. It has been extensively developed in a commercial fab also. The technology is far more advanced than your post suggests. We are led to believe it is just a fourth channel issue and can be resolved with time and money, which is what I hope India can provide. The problem in theory has already been fixed with a BICFET.
That said it is true, no products have been developed yet. But that’s what we hope and I suspect India have planned.