Google could remove the back button in Android Q based on testing performed by XDA Developers.
Fine with me - I wish they'd done it already.
Two buttons, one centred and one to the left, is just ugly. And the default placement of the back button, half way between the pill and the left side of the screen, is bad ergonomics as it forces you to reach a long way for no purpose (it had a design motivation when there were buttons both sides, but now just exaggerates the imbalance). Just sliding the pill would be easier, as well as less ugly.
What would be better would be if Google would also let you customise the gestures. For example I have little use for the "slide to the right = switch to most recent app" gesture (I usually forget that it exists), so letting me assign it to something else would be handy. But Google are very much like Apple in that respect: they tend to think that they know best and hence no options are needed.
I guess that on-screen gesture is the future.
In the Minority Report movie, Tom Cuise doesn't need Back and Home buttons to make the screens work
He also couldn't go anywhere without "personalised ads"...
No kidding, it feels ugly and looks so disturbingly, but you get used to it though.