This most important for systems run from battery power.
When power levels get to a critical low, it is common for controls to cause a workstation hibernation (suspend-to-disk). On returning to the box, the end-user will see the workstation as power-off. If the restart is shortly after shutdown, there is not much concern. However, the restart might be later in the day or overnight. On restart, one will see a standard boot menu. It would be nice to see some indication that a hibernation is in progress.
Should the end-user dual-boot into a different OS, forgetting about the pending hibernation, all of the hardware state gets scrambled. When they try to resume the suspended environment, the scrambled hardware will likely [my experience] balk at the recovery. This renders the hibernation useless. [again, my experience.]
One might argue that there are other issues if a system in hibernation does not restart across a dual-boot or similar alternate use of the hardware. I suspect that system hibernation is designed for restart into the runtime environment from which it was suspended without any intervening use of the underlying hardware.