My speculation why Motorola dropped the “8” from the 8th gen. Moto G phones in the US only: to avoid any problems that tend to be labeled as a type of gate: Antennagate, Bendgate, Batterygate. “Gate” has a negative connotation. In the US, a “Motogate” (Moto G8) might not work. So we had the Moto G Stylus and Moto G Power. And the latest announcement adds the Moto G Fast!