With these CPUs one can definitely hit much higher rates.

800Gbps from a single server was achieved by Netflix on much lesser systems two years ago:

https://nabstreamingsummit.com/wp-content/uploads/2022/05/20...

If I were to guess, this hardware can do double that, also helping that we now have actual 800Gbps Ethernet hardware.

Indeed 20 years ago this would have been racks of gear at a very high cost and a huge power bill.