If you power up a virtual machine, especially linux, you won’t get access to the console until the unit is either almost fully booted or fully booted. So if your trying to troubleshoot a startup problem, you can’t. You can’t reset power on the virtual machine, because the console will go away and you won’t get it back until the virutal machine is booted. I’ve not taken to logging into the machine and issuing a reboot command immediately after booting so that I can monitor what’s going on.
So annoying.