Why haven't any studios thought to put SD quality video on blu-ray discs? I know that when people hear blu-ray they immediately associate it with HD video, but there's no reason why blu-ray discs can't also be used to store SD quality video. I mean, blu-rays hold like 5 times the amount of data as a DVD, so you can imagine how cost effective larger series would be if released in SD quality but on blu-ray discs. Think of a show like Law and Order: SVU for instance. 20 seasons (currently in its 21st), 6 DVDs per season, 120 discs total. But if those same SD quality episodes were put on blu-ray discs, it would knock it down to like 24 discs. Plus, blu-ray discs have the added benefit of the protective, scratch-resistant coating. I've brought this idea up to several studios, but none of them have ever done anything about it. I just think it would be an interesting idea, especially in this current binge-watch culture. Imagine sitting down to binge-watch a series like Breaking Bad and only having to change the disc 4 times. Just an idea worth discussing.