This is not my experience. I have used many 1000BASE-T dongles and they work exactly as advertised - capable of transferring at ~950Mbps. I have also used 2.5

This is not my experience. I have used many 1000BASE-T dongles and they work exactly as advertised - capable of transferring at ~950Mbps. I have also used 2.5GBASE-T dongles and speeds are in the 2Gbps+ range. WisdPi are even offering dongles with 5GBASE-T support (RTL8157 chipset): https://www.wisdpi.com/products/wisdpi-usb-3-2-5g-ethernet-adapter-wp-ut5-wired-lan-network-connection-for-mac-os-linux-windows-backward-compatible-on-5g-2-5g-1g-100mbps-ideal-for-gaming https://www.wisdpi.com/products/wisdpi-usb-3-2-5g-ethernet-a...