There was a format war between blu-ray and HD-DVD, but I'm not familiar with such a war at the introduction of DVD and I feel the same about the introduction of CD (I could be completely wrong about this--I'm not an expert by any means.) Also, both CD and DVD content and players persist in the marketplace to this day. I guess what I mean is that the introduction of higher-capacity optical media hasn't always been a disaster, nor has it proved mandatory, except in the very long term, for consumers.