Ever since its appearance in Android Pie, I always consider 2 button navigation is a bad attempt by Google trying to play catch-up with the fad generated by the iPhone X. However, due to a bug with A13 QPR2 it had to be temporarily removed and many were not happy about this. So, 2 button navigation users, may I ask why do you prefer this method? To me it makes you do more for the same action whilst doesn’t save any screen space.
Biggest advantage of gestures has been not getting burn in for me. Getting nav bar burn in on amoled screens over the years has led to me doing my best to avoid static elements. I’ve even burned in static elements from apps.