[u801e]

Email clients have moved over to conversation view, which is supposed to make email threads look like conversations you see in a chat client. The message itself still quotes all previous messages, but it's all hidden unless you look for it.

The interesting thing is that if you use a conventional email client that supports actual threading using the Message-Id and In-Reply-To and References header values, and you edit the email message to trim quoted content and reply inline, the conversation view implementation in their email client breaks and it shows a blank message.