Moto X 2013 had thier weird/custom x8 CPU architecture, so no wonder why os updates to that particular model took longer. The later moto X versions changed to a standard arm CPU architectureb166er1337 wrote: ↑...There are few exceptions like Moto X 2013 or the Verizon variant, but for most Moto X and G versions, it has done more than enough.
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https://en.m.wikipedia.org/wiki/Motorol ... ing_System