Comment by veunes

OCS is indeed an engineering marvel, but look at NVIDIA's NVL72. They took a different path: instead of flexible optics, they used the brute force of copper, turning an entire rack into one giant GPU with unified memory. Google is solving the scale-out problem, while NVIDIA is solving the scale-up problem. For LLM training tasks, where communication is the bottleneck, NVIDIA's approach with NVLink might actually prove even more efficient than Google's optical routing.