Life Observatory
I find the 'thanks wave' is becoming an obsolete action on the roads. You're stuck in traffic and you see another driver trying to get in or make a turn, so you let them in. Surely, you didn't have to, and by the bumper-to-bumper ordeal to your front and rear, it's possible this driver would have been forced to wait for traffic to clear completely. I will never discontinue this silly ritual-but like other dying commonalities, I can see the 'thanks wave' becoming a foreign act in the near future.