I'm interested in IPv4 in IPv6 and vice versa, TCP in UDP and so on for the data-plane. Imagine something like TailScale.com [0] but managed and not P2P, or maybe running something like Wireguard from within a unikernel. I'm not even sure if it is a valid use-case to have long-running unikernels? Also, does that count as NFV/SDN? Currently, I run the data-plane workload isolated via VMs and they are always-on, even when the traffic is non-existent.

The requirement for HTTP workloads is mostly for control-plane APIs, and imo, Workers will work really well, for that.

[0] https://tailscale.com