When the rumors of the ROG Ally X started coming out, one of the first things they said was that it didn’t replace the Ryzen APU from the original design a year ago. That made me sort of dismissive of the new portable gaming PC…and that was a mistake. The upgrades that Asus has made to this thing are far more than skin-deep. The Asus ROG Ally X has been redesigned in pretty much every component, with the notable exceptions of the processor and screen. The battery is twice as big. The RAM is boosted by 50 percent. The storage can now accommodate a 2280 M.2 drive — the same size used in desktop …