An optional data retention policy would have the advantage of not exposing HNers to the risk of having their data taken to train a language model that emulates

An optional data retention policy would have the advantage of not exposing HNers to the risk of having their data taken to train a language model that emulates their style (which in the audio medium is called "voice morphing", and in the video medium is called "deepfakes"; it doesn't seem to have a name of its own in the written medium yet).