Back in the days before Digital Restriction Management, you lose your music file if you misplace/lose your CD or MP3 player. Then, the power that be introduced Digital Restriction Management, which they wrongly called Digital Right Management. With this, you now have another reason for effectively losing your music file: The inability to transfer music from one device to another as you lose the ability to activate/deactivate devices for your music file.
This came earlier than expected. In this case, from Microsoft. Its “planned” removal of the authentication servers you need to contact to activate/deactivate devices for your music file under its PlayForSure DRM scheme means you cannot change devices once the servers are removed.
It will be unfair to place the blame on Microsoft sololy, as this problem will sooner or later hit other music sellers, including Apple’s iTune. I cannot say PlayForSure users will be surprised by this, nor can I say they do not deserve this, since they signed up in the first place. Is it fair? I don’t know. There are a lot of factors that can affect the fairness equation: If you get music cheaper because DRM was slapped on, then in my book you made the compromise and simply got a bad deal.