From what I have read and seen, I gather that once upon a time in aviation it was not uncommon for aircraft to radio one another to ask questions about local conditions and exchange information. Of course, with the significant increases in technology that allow aircraft to remain in contact with control centers just about anywhere in the world they may be flying, there would probably be less of a need to contact another pilot or flight crew for relevant information. Also, with the greater amount of air traffic these days, everyone "chatting" on the radios to each other would probably dangerously clutter communications.
However, I was wondering if there are instances where crews of different, nearby aircraft still communicate directly to one another. I know that at an uncontrolled airport (one without ATC), pilots will radio to traffic in general to inform them of intentions, such as when taking off and landing. But, are there other regular instances where pilots or flight crews are in communication with one another?
Just curious,
~Darrin