If I remember right, in the press conference they suggested desktop users would use a gpu because desktop uses are less power sensitive. That doesn’t address the vram limitations of discrete GPUs though.
I totally agree that we should get higher vram sizes on GPUs but they are not the same as DDR5.
The one you listed does around 50Gbps. A really good gpu does almost 450Gbps. Prices as you know also don’t scale linearly. For something twice as good sometimes you pay 4x the price and so on.
This is a really important point. The architecture and the bus ram is connected to is also very different on on a discrete card than it is in a cpu. Each compute unit needs dedicated bus width connected to dedicated memory. So for most GPUs you can double the ram, but you couldn’t just add the equivalent of a stick of ddr5 because it wouldn’t match the dedicated bus
