You would need a minimum of a couple of SSD's in raid or a fast m.2 NVMe drive/s to take advantage of those speeds 👨🏻
assuming you only have 1 PC at the end of the connection. the point of these level of speeds is for connections that serve whole buildings/areas, not a single connection.
They already have more bandwith than that to serve whole areas, so what would be the point of testing 8GB if it weren't meant for individual use 🙄
when i said area i didn't mean a street or town. as i said, this isn't intended for a single connection. it would be pointless as home hardware couldn't handle it, and there is very little on the "internet" that would be able to serve you at that speed.
this is primarily about future proofing and "proof of concept".