Comment Re: 3 separate machines in one box, (Score 1) 36
"Doing it in software means you can move CPUs from one machine to another based on the time of day."
Which you could do with a single OS much more effectively.
"Your CI infrastructure can lose some resources from its UI at night and make another server for nightly builds when most of your users are away, without either having a VM layer in between or needing the builds to happen on a kernel configured with the features needed by the UI."
But not without restarting and with the limitation that different "systems" can corrupt each others' memory. It's a crappy reimagining of all the problems an OS was made to solve before we were born.