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Who's going to pursue a case? WADA aren't going to spend money identifying athletes that they can't then bring a case against. Their budget is small enough as it is, without wasting some of it on identifying potential cheats from ten years ago, many of whom have probably retired now.
It's good that the legal precedent has been set in Spain, but I think that's the only positive (excuse the pun) outcome from this. As @hippy rightly says, the timing of this case is remarkably convenient, given the ten year statute of limitation milestone was passed a couple of weeks ago.
The statute of limitations means most will get away scot free though.