focus on high priority elements about layout-instability

[skobes]

I agree with the observation that users care more about "critical content" like headlines and hero images. I expect we will learn a lot from LCP about how to identify this type of content. It's possible some of that logic could be reused by the layout stability algorithm.

On the other hand, layout stability already gives priority to these elements to some degree, by considering the size of the impact region. Where the critical content occupies a larger visual area than the non-critical ads and widgets, layout shifts affecting the critical content will be penalized to a proportionately greater extent.

Where a page has non-critical ads and widgets that both experience layout shifts and occupy a larger visual area than the critical content... I think we should penalize that too.