One feature I'm missing is the ability to display 3 lines (from, subject, and the first line of the body) in the message list. When dealing with monitoring and certain notifications, I have to open each email to see its contents.
> Cards View is still in active development. More features such as a message preview line and sender avatars will be added in the future.
[1]: https://support.mozilla.org/en-US/kb/thunderbird-115-superno...