I'm sure if the tech were up to the task, they'd have a robot you could walk around with and look at things. But it'd need really good resolution and dynamic ra

I'm sure if the tech were up to the task, they'd have a robot you could walk around with and look at things. But it'd need really good resolution and dynamic range paired with flexible and fine motor control to lean into an engine and look for tiny bubbles. This is a research field of its own. Not something they just have. For example: Humans improve their visual perception by lightly shifting their heads to avoid reflections, gauge shadows and mitigate obstructions. If the tech can't follow, you have an inferior solution. A solution where bubbles will be missed. Just staring at a screen is not the same. Even if you can tilt the camera.