That’s interesting. For the rest of us I guess it’s just the law if large numbers that our air conditioners don’t cycle off at the same time
Like a black out.
What really hurts is are all the rotating machines, especially the one-phase ones (fridge, AC, blower). Those have transients that last several cycles and are electrical shorts until the back emf is setup.
Utilities will try to roll the power back on in sections to avoid instability, starting with hospitals and those near hydro plants.
But you can help put by turning off your stuff during the blackout and when the light come back on walking around the house to turn them back on.