I can't stand it. Maybe if I always hit keys perfectly I could find a use for the feature, but I don't, and X is next to Z, and C is next to V, and I absolutely hate how the editor selects the entire line before cut/copy if nothing is selected. Think I should just suck it up and type more accurately? I invite you to try typing with my fingers.
There was (from a search of old posts) once a plugin called NoSelectionCopyKiller (created by some other enlightened individual with uncoperative fingers), but it doesn't seem to exist any more, and it's entirely possible that it wouldn't work in the latest version.
It has to be a relatively simple thing to disable. Why isn't there a configuration option for it? See: http://youtrack.jetbrains.net/issue/IDEA-15815 -- Personally I think it's reasonable to expect an option to force the editor to conform to standard cut/copy behavior, but apparently not enough people are bothered by it to make a difference to the devs.
Is the plugin still available somewhere? If not, can someone point me in the direction of how to write a similar plugin? Are there any other options?