> upgradeable VRAM Consumer class GPUs don't have a lot of flexibility regarding VRAM size or type. GPUs have highly optimized, integrated memory controllers

> upgradeable VRAM Consumer class GPUs don't have a lot of flexibility regarding VRAM size or type. GPUs have highly optimized, integrated memory controllers that are designed to use one or only a small number of distinct VRAM capacities and types. Enterprise class GPUs do have more options wrt VRAM, but it's still not a free-for-all like typical desktop/server RAM configurations. I suppose one can imagine this changing in the future, but the memory controller complexity and costs (die area, power consumption, etc.) would need to be greatly increased.