I can vouch for this from personal experience. Back when I had my Nexus 4, the built-in keyboard surpassed the current Gboard by a long shot. I'm not sure what

I can vouch for this from personal experience. Back when I had my Nexus 4, the built-in keyboard surpassed the current Gboard by a long shot. I'm not sure what happened along the way, but the spell-checking capabilities of the completely offline and lightweight keyboard that Google shipped back in those days were miles ahead.