Nvidia did it by allowing GPUs to access system RAM & networked storage directly - providing more external resources to the GPU is more or less the opposite path to that pursued by Apple.
Apple's Uniform/Unified Memory access does not supply the GPU with system RAM access? Opposite path? Not hardly. It is actually further now that particular path than Nvidia. Apple isn't using open standards to do that though (CXL 2.0 , etc. )
InfiniBand and much greater than 20GbE Network storage? No. Not even InfiniBand or > 20GbE options for macOS. But local storage was just added in this round of updates. It was covered at WWDC 2022.
Load resources faster with Metal 3 - WWDC22 - Videos - Apple Developer
Discover how you can use fast resource streaming in Metal 3 to quickly load assets. We'll show you how to use an asynchronous...
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If had a network storage device that presented as a local "NVMe SSD" device to the operating system, then there is a decent chance this basic mechanism should work. ( I'm pretty sure Apple didn't hard code this just to their specific Apple SSD. So as long as a NVMe SSD (or perhaps generic SSD) it should likely work. )
[ I suspect that Apple has a security hang up with RDMA drivers for very high speed networking. If so then 10GbE is about as far as they are going to show an interest in for a decent amount of time. Apple is still selling last century 1GbE connectors on systems. It is one of the few areas where they doggedly cling to the past in a shameful state at the prices they charge for systems. ]