Oh you didn't try it yet..
My buttonless and "status bar" -free Nexus 7 dream is almost in my hands. Only thing missing is the way to get notification and quick settings by swiping from top of the screen.
Pie hasn't crashed yet. Maybe it will soon. Wait, did you meant to say "bring back navigation bar via settings" or "bring back navigation bar by long press power button". In my N7,when I long press power button I can select expanded desktop to be enabled or enabled. Not sure if this is the default.
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