Large industrial customers often have to sign up to load-shedding agreements wiith grid operators in times of peak grid load.
Can datacenters load shed when requested? If not, they should be paying a premium/spot market prices for power if they arent participating in load management.
The one I toured (decades ago) and dual redundant multi-megawatt diesel generators (big boys, always ask for a tour when they’ll be testing them, it’s fun to hear them start).
Local utility would ask them to shunt to the generators now and then during potential rolling blackout situations.