Stun is a protocol to query the network about the topology. Turn is a protocol to route through a third party when p2p fails. Both of these are part of the ICE methodologies.
Yeah I went from notepad to visual studio to emacs to sublime text2 to vscode and finally gave up all that nonsense and got back on good IDE and got Clion. Simply the utility of the code refactoring tools completely blows any text editor out of the water. For example when I want to do a simple refactoring such as rename a function or a class I can do this trivially in seconds. I could never find anything like this for any of the editors I tried before. OK, I mean there's some clang based plugin for vscode for example but the the functions it has (such as code completion) basically almost never works and it has very little to offer in terms of refactoring.
That being said I adopted emacs style key bindings which I use continuously for the most common editing things. I find this is really the best bang for the buck and best of "both" worlds!
When I was a kid (teenager) I worked at an indoords shooting range, mind you, not real guns but just BB guns. I was supervising a bunch of school kids do some practice shooting at biathlon targets (just 10m however) and one of them had an issue with the gun with the pellet getting stuck somehow. I had a look at the gun, sorted the pellet out and fired the gun off the hip and hit a bullseye without aiming. Pure luck of course but the kids were like "woaaah" and of course I never told them that it was just luck and not my mad leet shooting skills XD