So what? How many people know that, and of the people who do, how many bother to do it? Even among those who do, the legality of what they're doing is unclear. I don't see how it changes anything the article says.
The author is talking about a societal shift whose consequences are difficult to foresee; one person electing to only use CDs, DVDs, flip-phones, and the like makes little difference to the broader trend.
I didn't say anything about exclusively using CDs, DVDs, etc. I'm talking about removing DRM. Amazon et al do not get to unilaterally enforce their notions of ownership. Consumers can take control of the things they buy if they choose to.