Richard P. Kluft said this quote

“ The implication that the change in nomenclature from “Multiple Personality Disorder” to “Dissociative Identity Disorder” means the condition has been repudiated and “dropped” from the Diagnostic and Statistical Manual (DSM) of the American Psychiatric Association is false and misleading. Many if not most diagnostic entities have been renamed or have had their names modified as psychiatry changes in its conceptualizations and classifications of mental illnesses. When the DSM decided to go with “Dissociative Identity Disorder” it put “(formerly multiple personality disorder)” right after the new name to signify that it was the same condition. It’s right there on page 526 of DSM-IV-R. There have been four different names for this condition in the DSMs over the course of my career. I was part of the group that developed and wrote successive descriptions and diagnostic criteria for this condition for DSM-III-R, DSM–IV, and DSM-IV-TR.While some patients have been hurt by the impact of material that proves to be inaccurate, there is no evidence that scientifically demonstrates the prevalence of such events. Most material alleged to be false has been disputed by someone, but has not been proven false.Finally, however intriguing the idea of encouraging forgetting troubling material may seem, there is no evidence that it is either effective or safe as a general approach to treatment. There is considerable belief that when such material is put out of mind, it creates symptoms indirectly, from “behind the scenes.” Ironically, such efforts purport to cure some dissociative phenomena by encouraging others, such as Dissociative Amnesia. ”