FWIW, there are still differing schools of thought for application of a forward face (template) for mobile/smaller devices/tablets. Ie. Template that rearranges content as the display size changes vs. a different application/style providing the view. As a result, I would think that it may be "difficult" to claim just one style of presentation as the opener for the base template... That said, providing a means that is relatively device independent may be considered ideal not requiring core/baseline changes for new devices...
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