Isn't its bootloader locked? Last time I checked you needed to go to Motorola's website to download a key specific to your phone so you could unlock it, but it voided the warranty.
My entire family uses different Moto G versions. I have the G4, one of my sisters has a G3, and my parents and my other sister have G1s. They just seem to work and are very good first-time smartphones for my parents. It has been several years since they got them, and I don't even have to provide technical support. Honestly, I see very little reason to unlock the phone.
