Nvidia uses RISC-V as the main controller cores in its GPUs. They’re also exploring replacing their Arm CPU with RISC-V I hear.

Meta recently bought Rivos in a huge show of confidence for RISC-V across processor types for server class.

As for fabrication, the poster above has a lot to learn about both the US’ current weak at-home capabilities (and everything they’re building relies on European suppliers for all the key technology and machines etc.) and about the scaling properties of sub-14nm nodes. Any export controls or sanctions to prevent Europe using American-designed Taiwan-manufactured chips would result in American being cutoff from everything they need to build fabs on US soil. It would backfire massively.

Lastly, the UK and EU already have cutting edge AI Inference chips, and the ones for training are coming this year. Full stack integration (server box, racks, etc) is also being developed this year. We’re not a decade away from doing this - we’re 18 months away. Deployment at scale will take longer - not having Nvidia as competition would be a huge boon for that haha!