>> At domestic levels, its more difficult

Not sure if this is correct. Once power cost is reduced, the cost of investing equipment dominates still further. Industrial processes are designed to operate 24/7 and when they don't, they are uneconomic.

Domestic power consumption is never 24/7 on any major device and there is some discretion over scheduling. Even fridge/freezer has some flexibility

One easy one is charging electric cars. If they can be plugged in both at work and at home, there's a huge opportunity to charge when there's excess production.

I can imagine settings where you can define when to charge e.g. "Charge to 20%, then only at peak excess energy times", like how people set the dryer to go overnight when there's excess energy