I wonder what senior means here. Like, unless it’s fairly junior seniors, the ratios are going to make that impossible.

Even if they have an army of senior engineers, reviewing AI generated code is fundamentally different than reviewing code written without AI. The change is usually larger, looks good on the surface and there are stupid mistakes in it. It's like reviewing someone's code whose only goal is to get an approval on the change.

So exactly like reviewing a code change from an outsourced development team in another country?

I'm not sure. How common is it to review the outsourced development team's code? My guess is that there is rarely any review. They usually ship the whole software and are responsible for it.

I spent years doing it.

Too bad Amazon laid off a bunch of their senior engineers over the last few months.