Anyone who knows filesystems would have said "No Duh". Caching on NVME will always be significantly faster than remote, simply because of network latency hops -

Anyone who knows filesystems would have said "No Duh". Caching on NVME will always be significantly faster than remote, simply because of network latency hops - Even at microseconds per! There's really not a huge difference between modern PCI-E Architecture and modern networking - but the length of the cables matters a lot at these latencies. All that said - There's still a ton of room for NFS to be the backing store, but more importantly there's room for distributed filesystems with intelligent caching to displace all of this.