I recently had my position reinforced professionally.
I did the programming and commissioning for the new AV system for a power plant control room.
Some of the PCs in that room were over 15 years old. Some were running Windows XP. One, the main control computer for the natural gas generator, ran Windows 98 SE. Part of the commissioning process was trying to get the video for these PCs into HDMI inputs on a video wall processor in a rack in the next room. I recommended they use HDMI-over-Cat6 extenders and not move the PCs, because to move them would require shutting them down.
The Project Manager, the plant shift leader, and everybody's bosses all agreed with me. They put in a ticket with their IT department to get that done.
The IT blowhard showed up, scoffed, and shut down the first computer to move it.
It did not power back on.
Fortunately it was one of the slightly less critical ones.
So yeah. Over the years, my experience has been, whenever something dies irretrievably, it usually happens during a reboot or power-up. Especially hard drives.