How does it deal with AVB? Does it have a secure element that works with Android keymint? Does the bootloader implement fastboot? Is it unlockable? What does t

How does it deal with AVB? Does it have a secure element that works with Android keymint? Does the bootloader implement fastboot? Is it unlockable? What does the partition layout look like? I suppose the actual magic has to happen in the "abl" part and this is where it gets very interesting, but these announcements were extremely light on details..