[muawiyah]

If you have half an hour and your system will slag out it makes sense to ignore the 12 hour proper shut down and just flip the switch now!

[Dan(9698)]

I remember that the Nike Missile radars had a 30 minute timer on start-up. Time to warm up everything.

They also had a “battle short” switch that overrode the timer.

The warm-up could be skipped in an emergency.

Computer systems are similar.

It may take time to get them back up, but shut-down isn't fatal.

[N3WBI3]

no doubt that would make sense but there would be damage to multiple systems all over the world....

Just saying that there would be a huge financial impact...