Android allows, sure, but these systems have a chicken-and-egg problem where their sensors aren't exposed in a way that third party apps actually access to the ability they can. The YN455 has this problem today. Plus, it doesn't change the fact that you want that phone-camera to get android updates for security purposes, and now you're back to the fact that most camera makers are pretty crap at user facing operating systems. I think it's an impedance mismatch, really
It's a good idea, but I just don't think it's going to work. The mechanical connection between the phone and camera is awkward, and connectivity through Bluetooth/WiFi can not be seamless enough. Especially in challenging radio environments (like a concert).
> I don't trust a camera manufacturer to keep their Android deployment up to date, or even to really fix that many bugs in it, and a whole Android OS is a lot more complex for them to manage than SwitchLens/Alice's apps and internal RTOS + comms layers.
Android can allow third-party software, much easier than hacking into the proprietary OS.