Sure, but an event parameter could (potentially) do away with the need for an AS script, which in an otherwise completely vanilla level would prevent stuff like saving the game or adding secret levels.

Not to mention the aforementioned code snippet does not play nice when the desired track is the same as the level track. Right now in order to make it so the level keeps its regular music during the boss you have to use text IDs and slightly more coding.

Again I'm aware that none of this is particularly difficult once you know what you're supposed to do, but it would be nice to have something a little more convenient, event parameter or otherwise, especially for beginners.