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There are more places where bandwidth is a bottleneck now than 10 years ago.
NIC speeds have gone from 100Gbps to 800Gbps in the last few years while PCIe and DRAM speeds have nowhere increased that much. No way are you going to push all that data through to the CPU on time. Bandwidth is the bottleneck these days and will continue to be a huge issue for the foreseeable future.
There are still places where bandwidth is a bottleneck, even on internal network is essential to optimize for bandwidth
There are more places where bandwidth is a bottleneck now than 10 years ago.
NIC speeds have gone from 100Gbps to 800Gbps in the last few years while PCIe and DRAM speeds have nowhere increased that much. No way are you going to push all that data through to the CPU on time. Bandwidth is the bottleneck these days and will continue to be a huge issue for the foreseeable future.