The new “card” design mentioned earlier is also used when starting a new message in the Messages app, allowing it to be swiped down and away if the user changes their mind, while also cleverly hiding the iPhone X-series notch by going all black at the top.
Unlike Mail, however, the card design doesn’t let you start a message as a draft. Swiping the card away will discard the new message, rather than just pinning it at the bottom of the screen. We still like the more consistent UI, though.
iOS 13 Messages also gets an improved search feature, along with the ability to now specify a name and picture that can be shared with other iMessage users (but only if they’re also running iOS 13 or macOS Catalina).