The feature that is missing and most important is called out in the article: a standardized form of DRM. If you're selling a subsidized product and depending on

The feature that is missing and most important is called out in the article: a standardized form of DRM. If you're selling a subsidized product and depending on consumable content (like razors and blades), DRM seems like something you would want. Likewise, if you sell a digital product that can be copied, DRM would be seen as an advantage. Other online media, notably streaming services and Xbox, DRM everything. I don't think Amazon is an outlier here.