I just turned off conversations.

My habit is to reply as needed, keep what incoming mail I need, and delete all the rest. For reminders on how I spent recent time, I look at my sent file.

BUT...replying to a message puts both incoming and SENT reply in the same conversation -- so if you then delete the mail you read, you also delete any replies to that mail, losing the ability to track that this conversation ever existed at all by looking at your replies.

From what I see, this feature is worse than not useful.

Feel free to enlighten me.

Thanks,
Rob