I am not aware of any such studies but I would be curious if you have references. There are only a few isolated parts of the brain that show neurogenesis (the birth of new neurons) in adulthood - the hippocampus and the olfactory bulb are the primary two examples. Alcohol kills neurons across the entire brain, with volume reductions and microstructure damage in the white and grey matter, and the damage is not limited to any specific areas.

There is some functional recovery after abstention from alcohol consumption due to regrowth of synapses and neuroplasticity, much in the same way our brains can partially recover from a stroke even though the neurons in the part of the brain that was deprived of oxygen are permanently lost. However the recovery is not complete and some of the loss of brain volume is in fact permanent.