In addition to been faster it is also the only vpn that reliably handle roaming, without interrupting active connections.
My laptop can run chacha20 at 2GB/s on a single core. Encryption performance hasnt really been an issue for a long time. Most VPNs will be running AES128 that has hardware support and should be even faster.
Used 10GbE ethernet components are cheap on ebay.
I built a 10GbE 'switch' by buying 2 4 port SPI+ PCIE cards off of Ebay and then joining them together with a conventional Linux Br0 bridge on a old Intel gaming machine. Had no problem keeping up with line speed.
I didn't test wireguard with it, but it should work pretty effectively for testing what speed it can get up to.
This mirrors my anecdata on consumer (<$150) wifi router hardware. I recently upgraded my home router specifically for wireguard and it's been 5x faster than openvpn.