LOL? In which countries a phone connection is not terminated, if one side hangs up? Here in Germany the call definitely is terminated if one side hangs up and you would have to redial. And this behavior is not new, the phone network does behave this way since I can remember. With VoIP this is AFAIK the default behavior of most clients, too. (However, on protocol level, there is a 2 sided termination)
In Canada, hanging up for a short lapse of time won't terminate a call. The US probably use the same system as well.
Yes, for old analog wired phones quickly (< 1s) pressing down and releasing the hook does have this effect here, too. But this is intended and used as signal to the network to access several advanced features.