Netflix still offers their DVD service.
And many people don't even have DVD players anymore. I don't.
I think film students and the like. It's become a niche product, not a mass-market one.
Many companies fail to adapt and stick with old business models. Netflix did the exact opposite and took their dvd business behind the barn and shot it in the head.
The only reason I do is because gaming consoles double as DVD players now. I assume that's a leading force in why others might have DVD players, too.