[scns]

Conurrency instead of parallelism.

[wmf]

No amount of concurrency on a single core can equal the performance of multiple cores.

[pjmlp]

That is why you deploy a process per core, with affinity so that it doesn't jump around.

[cestith]

You can run more than one unikernel per machine. That's why things like KVM or Bhyve are targets instead of just bare metal.