Any AM5 mainstream B850 motherboard supports up to 256 GB RAM. And this is not even quad-channel either, but dual-channel/2*64-bit/128-bit, just like the midrange B850 is:
Quote from: amd.com/en/products/processors/desktops/ryzen-pro/9000-series/amd-ryzen-9-pro-9965x3d.htmlMemory Channels 2
Max. Memory 256 GB
System Memory Subtype UDIMM
The 96 GB VRAM consisting of a single GPU, instead of 2 * 48GB VRAM GPUs, is good, on the other hand. Especially the option to be able to choose the 300W Max-Q variant. But why not offer the option of being able to choose 2 RTX 6000 PRO Max-Qs, that would make the system/offering at least somewhat special.