In the dark, with the other side obscured (or just broken), you don’t want the blinker to actively prompt you to come to a wrong conclusion.
It’s better to see a blinking light and think “I don’t see enough, gotta slow down” than see a blinking arrow and potentially not even realize it’s a turn signal.
Please correct me if I’m wrong, but doesn’t this allow one to represent virtually any resource as a mail inbox/outbox with access through a generic mail app?
I’m working with a specialized healthcare company right now, and this looks like a way to represent patient treatments data as an intuitive timeline of messages. With a local offline cache in case of outages. Security of local workstations is a weak point of course, but when is it not…