The days are getting longer every year. The Earth's rotation is slowing, and not at a constant rate. Since the mid 1980s, the we've lost over 21 seconds in the day.
Same reason people use Windows. Because a lot of other people use it so it's compatible with a lot of other people's stuff. RealPlayer also makes for quick downloads since the quality is so poor.
Why do we have a society where we have to work for most of our adult lives and only get to play when we're either too young or too old to really enjoy it?