Sometimes it’s the little things in life that bring the most joy. Google often uses Android developer previews to test small changes and gauge public opinion on them ahead of a final release. This may or may not be one such example. Dev Preview 3 has reversed a tiny change that was made in the last version, namely changing the order of the WiFi and cellular icons on the status bar.
Android O feature spotlight: WiFi and cellular status bar icons switch positions again [order has been restored] was written by the awesome team at Android Police.