Well, I think the physical mechanism of turning off chat history on most of the modern chat platforms is to have a database delete each message after everyone i

Well, I think the physical mechanism of turning off chat history on most of the modern chat platforms is to have a database delete each message after everyone in the conversation reads the message, which is a lot closer to destroying evidence than not making records. Also, if you destroy evidence that may be under litigation hold, the judge will instruct the jury to infer that what you deleted was harmful to your case.