I certainly want these words that I'm writing here to last longer than a week. The "expiry" is for everyone to choose for themselves I would probably choose 10 years or so.

Btw you can take it back IRL because human memory is limited and fallible and after a while everyone will have forgotten what you said. Digital memory is so much more long lasting it breaks all social conventions we have established for human memory. So we need to introduce a type of digital forgetting.