The chatter is that Skype has lots of security holes and Microsoft are actively looking for a better way to go. when and if that does occur, I imagine the servers will no longer work with older protocols. It has for some time also had far worse drop outs and ducking issues sounding like a very badly set up vox system, which is annoying if you need to interview some luminary over it as bits of speech vanish.
Team talk does the same, incidentally, but I was very impressed by a friends Face time system, its a pity Apple does not make this system work on other platforms.
Brian

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