When I was younger when walking in the countryside strangers would always greet each other with 'Good morning' (or afternoon or evening, as appropriate). Now they usually just say 'Hello'. Are they being more honest in not claiming it is good?
A few days ago when I passed a man on the path and he said 'Good afternoon', I felt really happy. It was like suddenly being taken back to a friendlier more familiar world.
In future, I shall greet strangers formally, and reserve 'Hello' for people I know.