When applying MCP on bare metal nodes the restart phase can be shorter, if we use kexec as an alternative to a full reboot.

I'm not sure if this is related to MachineConfig, but this improvement can also benefit OCP installation on baremetal, as we need to reboot 2-3 times as part of the installation process, which will reduce the installation time (as we spend ~10 minutes out of the 30-minute installation in reboot/hardware initialization).