On the negative side I have read that Judges prefer Substantive Consolidation as a last resort.
On the positive side I have read that the larger and more complex a Chapter 11 bankruptcy is - the higher the occurrence of Substantive Consolidation.
Here is an excerpt from just one article I read on Substantive Consolidation and if you will please note that the writer states Substantive Consolidation occurred in 8 of the top 10 - largest Chapter 11 bankruptcies - between 2000 - 2004.
Pages 252 - 253
"Substantive consolidation appears frequently in negotiated plans for our largest Chapter 11 reorganizations. My preliminary empirical study of the twenty-one largest corporate bankruptcy filings from 2000 to 2004, ranked by asset size, reveals that substantive consolidation was imposed, proposed, or settled in eleven of those cases. Eight of the top ten bankruptcies constituted “Substantive Consolidation Bankruptcies,” as defined in the study."