Some historical notes:

- A decade ago (2012), Facebook briefly had (but didn't sell) an htc Android smartphone that had posts on the lock screen. They might've also had an option in the Facebook app to do this in the android lock screen.

- In 2014, Joe Edelman wrote http://nxhx.org/Choicemaking/ with a demo of what an iphone lock screen could look like to honor 'time well spent'