To be honest with you, I was a die hard 3 button fan, and an anti-gesture person (cause iOS vibes). After sometime, it was like the best way to navigate! Can't go back to 3 buttons ever again. It feels so slow, and choppy.
P.S. If your apps has swipe to left to do X, you should change them for a better experience.
Can you give me some reasons please? I want to know it :).