Many mail clients do this 

 Which ones? 

 https://files.mastodon.social/media_attachments/files/109/762/187/768/391/444/original/bd0873e51ebcd2a2.mp4 

 Context: https://mastodon.social/@terhechte/109762188190735435 

 This simulates a messaging client, not a mailing one.
Btw, my idea is quite different.
Maybe I will design a mockup to explain it better. 

 ^ t-y 

 Stories & Communities fix most of this.

💫  Stories: 
A group of recent "frames" per user, of things they decided to put in the spotlight.
As opposed "following" every fart they make on Nostr.

You can swipe through the lists of pfp's and decide who to give attention to at what moment.

🏰  Communities: 
A way for you to only see daniele's posts about Nostr Design and nothing else.