What of previous generations of HBM? Older consumer AMD GPUs (Vega) and Titan V had HBM2. According to https://en.wikipedia.org/wiki/Radeon_RX_Vega_series#Radeon_V... you could get 16GB with 1TB/s for $700 at release. It is no longer use in data centers. I'd gladly pay $2800 for 48GB with 4TB/s.