I’m not aware of any large body of consensus yet on that. There were no comprehensive problems with the “old” system except that the payers were unable to adequately (for their purposes) control the way medicine was practiced. Same with the Patient Privacy laws. The only problem previously was that the powers that be did NOT have the implied right to see your records, but now, when you sign the forms acknowledging your rights, you give that right away.
*"Benefits of EMRs probably increase with larger practices where many physicians may benefit from easier access to the records of a patient who is seeing someone other than his/her regular primary physician. "*Their EMRs are just as bad as everyone else’s. The actual result has been to pasteurize the records so they all look the same.