News HBM2e Incoming: SK Hynix Kicks off Volume Production

HBM memory is faster, great however it's set right next to the GPU/CPU. The hottest part of the computer.
When it fails, not only do you need to replace the memory, you have to replace the GPU/CPU as well.
This is much more expensive than just buying new RAM or having your card re-worked.

That's a lot of expense for a RAM failure which becomes more likely at exposure to high temperatures.