Interesting Pablo, I see AMD adoption of HBM as yet another failure for the company. They basically adopted HBM in a time where HBM is unsuitable for professional products, bottom market products and APU products. Basically HBM products are only suitable for a very small niche. Nvidia OTOH built a very solid architectural foundation, and by the time HBM2 arrives they will have a solid solution on the wings for discrete cards.
With HBM AMD basically misread the market and shot themselves in the foot, being unable to compete on the mobile market and only being able to field HBM in a very small range of products. Was it worth to sacrifice the mobile market and the rest of the product stack in order to field, what, three or four HBM SKUs, that costs more to make than comparable Nvidia products? I doubt it.