Thank you for your votes and comments on this feature. The team is in the process of finalizing designs for deleting private chat threads. I will update as we have more progress to share.
An error occurred while saving the commentg allen commented
What is the point of caching all these old conversations in Teams? I have huge list of people I have talked to whose conversation history is meaningless past the date of the conversation but I cannot delete the conversation and hiding them still leaves them cached. I don't need the chat history.