Comment by nl

Signal does End-to-end encryption, so they (Signal) can never read it.

The whole point of ChatGPT conversations is so they can be read by the model on the server.

Conversations are kept around because they can be picked up and continued at any point (I use this feature frequently).

Additionally you can use conversations in their scheduled notification feature, where the conversation is replayed and updates are sent to you, all done on the server.

> OpenAI made a choice in how the feature was and is implemented.

Indeed they did, and it was a sensible choice given how the conversations are used.