Dude, 10 Gbps is not a myth if you have proper requirements to achieve this speed in Storage ? Here is example of transferring big file from NAS to PC via 10Gbps network with Intel X520-2 and MikroTik CRS328 via SMB share on Baremetal Synology (Xpenology) with 4x2TB WD RED + 2*250 Samsung 960 EVO SSD cache tier to PC with NVMe Samsung 970 EVO:
And here is transferring from PC to NAS:
It goes up to 670 MB/s when it goes to SSD cache tier, after that stabilizes at around 300 MB/s.