Data can and SHOULD have an expiry date outside of our sphere of control. The European Union has tackled this. The Canadian governments have attempted to deal with this.
By using Open Source, and requiring all publicly funded software systems that handle people’s personal data should be required to use Open Source Software and Data Principles is one way.
This has been quietly happening in many governments and corporations.
Now the conversations you have are yours to manage even when you’re chatting. This is why I use Signal