the delete host confirmation box could be a bit more explicit
Deleting a Host:
Are you sure you want to delete host <...>? This action is irreversible.
Deleting a Host and associated VM (vsphere)?
Are you sure you want to delete host <...>? This will delete the virtual machine and its disks, and is irreversible.
Right now the prompt is visually the same. Yes, there a few extra words. But a human isn't going to take the extra time to read the message. Maybe some highlighted text on "delete the virtual machine and its disks" or a confirmation checkbox. Or both.
Deleting the Host record, not an issue, but right now deleting a VM and its disks could be a bit more explicit. The difference between the messages is quite subtle.