They also liked charging you for buying 2 episodes on one VHS tape. Things change.
Also worth noting that more storage capacity doesn't demand more episodes. Higher quality (even up to no compressing encoders used at all) is still providing a competitive advantage, even if the number of episodes doesn't change. Or more features, obviously.
And I didn't read the article but if these discs are simply more flexible in terms of the amount of space you can use them for, with a less harsh cost scale as you increase size, then they would be advantageous for the studios.
Last but not least, the cost of media as far as discs are concerned is never a major concern in the pricing of a product, whether it's 1, 2, or 10. For 1 disc movie released for $20, the cost of the disc could be as little as 10% of the product's total cost. For a 10 disc season set, it's probably even *less*. More like 2-5%.
You're never ever paying for material costs when you buy something. You're paying for perceived value.
