supercurio

That's absolutely correct, thank you for the correction :)

It's still LIMITED on 5.1, however it's possible to control ISO, white balance, shutter speed, set a custom color space conversion matrix which allows a lot of cool things for a font camera.

Yes and one reason it took so much time might be the same reason why there's the risk Camera2 might stay a Nexus-only thing.

Manufacturers like keeping camera features, UI and processing exclusive to their devices, which is one thing encourages brand loyalty. The most users will rely on a favorite third party app, the more likely they might switch to another brand on their next device.

Yes with devices implementing fully Camera2, the rule is that you can stream full resolution sensor data to buffers that you can capture and save either for processing (like HDR & superresolution) or video recording :)

At that time, was the viewfinder preview built on full sensor readout or line-skipped/binned sensor readout?