Yes and no, if you really want it there is no reason you can't have it. I know that some OSes now do some link-stage procedures at boot, but we don't. Unikernel

Yes and no, if you really want it there is no reason you can't have it. I know that some OSes now do some link-stage procedures at boot, but we don't. Unikernels seldom need to reboot, and if they do, you might as well update it while preserving all the important bits (including TCP connections) by doing a live update. It's not exactly a simple solution as now you suddenly need a management solution. We also have the management part, but it's not a part of the open-source OS.