Also on this, people won't want to their previous content pruned. Using the ole twatter as an example, a lot of people relish in conversations they've had with people, revert back to them for future discussions, etc. Or imagine a nostr version of Facebook or Instagram where pictures self-destruct. 

If that is their expected behavior for a social media service, do you think they are going to accept that note where they ratioed and drug Mark Cuban to be gone forever? Or do you think Grandma Bettie is going to be cool with photo albums of her grandkids just disappearing. 

We keep seeing that they want mainstream usage or adoption but these are some basic ass user expectations.