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.
I also find the back gesture to be surprisingly convenient. It’s easier to reach, in part because you can reach it from anywhere on either side of the screen. And the gestures from the bottom lets you go back/forward an app, home and also all of the recent apps. And also assistant or an app of your choice by swiping from the bottom corners.
Plus, on top of that, on LineageOS you can also bind a custom action for a second stage for the back gesture if you swipe it further away, like kill app or go back to the previous app. And left/right side from the top for notifications/quick settings, and swipe at the top for brightness.
Zero pixels used for what, 9 different actions? It’s pretty sweet!