https://www.techpowerup.com/245531/samsung-doubles-its-hbm2-output-may-still-fall-short-of-demand
 
HBM2 memory demand is still very high. Samsung may not be able to cope with demand. Consumer products don't carry this type of memory so obviously demand for this memory for high end graphics cards for the professional/enterprise environment is at an all time high and likely will grow even more. This demand will also keep pricing for this memory very high. That is more than likely, in my opinion, why NVIDIA decided to use GDDR6 for the next gen consumer video card.