Well container came out of slimming down VMs. Meaning that rather than moving a whole OS from hardware to hardware, or spin them up or down as load required, y

Well container came out of slimming down VMs. Meaning that rather than moving a whole OS from hardware to hardware, or spin them up or down as load required, you would spin up or down processes and their runtime requirements from a known functioning image. Thus removing the overhead of the VMs hardware emulation and the need to run so many kernels. The response from the VM world to containerization seems to be to push unikernels. Effectively going back to the DOS days where you have just the minimal kernel and userland, all living "happily" in the same (virtual) memory space.