I tried to re-create the camera scenario. The camera screen would not pop up before the unit finished loading.
However once screen popped up, it processed apps as soon as I touched the icon.
I will add, my typical boot times have been a tad quicker then that video. Usually by time the chimes stop and I'm buckled up, the screen is ready.
That's good to hear. One of the annoyance I have with the PX6 unit is that when I often need the rear view camera, it's not yet available yet.
Bringing up apps is often an issue. It can be up to a minute before Amazon music, or whatever app I use, is ready to play music. If it's a short trip a mile away, it's not even worth trying to play anything...which defeats the point entirely.
I wish these android units would find a way to avoid bootup entirely. Obviously, you don't want to drain the battery, but it would be nice if you could add your own backup battery that keeps the unit in standby mode when not running, or something of that nature.