I have read some debate that the processor in the new Nexus tablet requires less RAM than those in the Samsung Tab S models. Though I still think more is better, and 2GB seems low to me by the latest standard specs.
It wouldn't surprise me if Android changes to prevent apps from running off external memory. There are obvious security issues with this current arrangement. I primarily use my tablet for media playback and not gaming, so such a change would have little impact on me.
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