Userland TCP/IP stacks are in fact a thing once again, for the sake of performance and scalability in high end systems. It's not common to most systems, but to

Userland TCP/IP stacks are in fact a thing once again, for the sake of performance and scalability in high end systems. It's not common to most systems, but to say it isn't done anymore isn't true. As we move beyond 40Gbps and 100Gbps Ethernet it's only going to become more common. https://datatracker.ietf.org/meeting/87/materials/slides-87-mptcp-1 https://datatracker.ietf.org/meeting/87/materials/slides-87-... https://shader.kaist.edu/mtcp/ https://shader.kaist.edu/mtcp/ https://github.com/google/netstack https://github.com/google/netstack https://openfastpath.org/ https://openfastpath.org/ https://github.com/libos-nuse/net-next-nuse https://github.com/libos-nuse/net-next-nuse http://www.f-stack.org/ http://www.f-stack.org/