The market is too small.

Yes exactly, I am hoping that when the AMD Ryzen Halo gets wider release and more consumers have these 128GB devices, the market will justify a wider range of quantized model sizes. And then when I win the lottery and can buy one I'll have lots of nice options!

The only (still in prototype stage!) "competitor" for those GB10/Ryzen Al Max+ 395 (in my region, borderline unobtainable) systems seems to be the Xiaomi AI Cube.