Most event badges receive some updates during the event and possibly one after.
After SHA2017 we decided we'd like to support the badge community for a longer time span.
In the last year and a half after SHA2017 we've regularly sent out OTA firmware updates with bug fixes and new features, including support for font antialiasing and stuff like that.
After SHA2017 the badge team made sure to bring replacement screens to events with visitor overlap.
TODO: add more examples ;)