I think they might be referring to a unikernel. https://en.m.wikipedia.org/wiki/Unikernel https://en.m.wikipedia.org/wiki/Unikernel In userspace, you can do w

I think they might be referring to a unikernel. https://en.m.wikipedia.org/wiki/Unikernel https://en.m.wikipedia.org/wiki/Unikernel In userspace, you can do what busybox does and link a bunch of programs together with a single main function that decides which program to actually run.