Most normal home freezers have a way of setting temperature, e.g. mine can go from -16 to -24 So maybe -30 is difficult but it wouldn't be that hard to have th

Most normal home freezers have a way of setting temperature, e.g. mine can go from -16 to -24 So maybe -30 is difficult but it wouldn't be that hard to have the existing temperature range on new models be dynamic based on electricity pricing