Good points all around. Apple's very familiar with DRM, and I'd wager most DRM'd content on most Windows and Macintosh OS running hardware was provided by Apple. Microsoft's approaches, though less practically successful on the popular media front, are certainly more successful on the OS front, as
another post slightly earlier has pointed out (quoted after this post).
Here's the rub, taking us back to the OP (and away from the Zune vs. iPod discussion this thread has taken):
None of the reasons given suggest Macintosh or Windows OSes would be less "DRM loving" (OP) than Linux. In fact, all we've determined is that
both Macintosh and Windows already support "DRM loving policies" (quote from OP).
I don't use Linux daily. I'm not a Linux fanboy. At the same time, if your top priority is a DRM-free "policy" for your OS, learning Linux and
forcing it onto your laptop [1], is going to be the best option.
[1] This in response to the troll-esque phrase in the OP trying to ensure that this would be a MS vs. Apple flamewar, "I like Linux, but it may not work with my laptop, so I don't really want to risk it." [emph mine].
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Microsoft doesn't just want to own your media - they want to oen [own?] your whole system and have the ability to shut your OS down remotely. Hell, Microsoft even tries to put DRM on your pre-existing content - for example, if you rip a CD with Windows Media Player. And their "PlaysforSure" DRM is way more restrictive than Apple's.
Just because Microsoft hasn't been particularly successful with their plans, doesn't mean they aren't trying.