The trick is there are multiple resume filters.

One will filter you out for having too many keywords. One will filter you out for not having enough keywords. One will filter you out for including a picture. One will filter you out for not including a picture. One will ... ad infinitum

Your resume is being evaluated by different filters constantly. Different filters filter different things. There is no "right" answer. There are only answers you will or won't be filtered out for depending on which filter is being applied.

Which filter is being applied?

It's random.

Hiring is essentially random.

Various vendors of software in that space claim they are best practice, e.g. IBM: https://www.ibm.com/talent-management/hr-topic-hub/applicant..., https://appsource.microsoft.com/en-us/product/web-apps/cem_b... promotes keyword matching as a feature, ...

Oh sure, I know they exist, but on the resume side there's no common knowledge of anything besides keyword stuffing. I'm wondering if that's actuallly the best way given how the filters actually work (which I don't know).