so like Git Citadel goes into nip29 and a thematic community doesn't need it, it uses group/communities/list/tags/subject and chooses 2 or three relays to write to. 
The problem with the lists is that you read everything about those profiles, 
in the chat there is moderation but they can come from anywhere,
then the chat is not available in many apps 

 Can you explain a bit more? Not understanding the last two sentences.