Presumably because of battery life when away from a power source.I don't get why Queen6 would say all other players "use more cpu" is a downside.
But other than that I don't see much point in worrying about CPU utilization for an app primarily used to play video (as long as it can play it stutter free). If I am watching a video I am not likely doing much else with the computer. Now if we were talking about a rendering app, then yea better CPU utilization is a big plus.
That said I have never had an issue with VLC. It seems to handle whatever I throw at it. I don't care what its roots are but I certainly remember being frustrated many times under Windows with missing codecs and whatnot (with just about any player--including media player classic).
Michael