Re: [w3ctag/design-reviews] Early design review for the Topics API (Issue #726)

More information regarding the privacy aspects: [Interest-disclosing Mechanisms for Advertising are
Privacy-Exposing (not Preserving)](https://arxiv.org/pdf/2306.03825.pdf) and [On the Robustness of Topics API to a Re-Identification Attack](https://arxiv.org/pdf/2306.05094.pdf).  My initial read of both suggests that these could be construed either as vindicating Google's position or as repudiating it, depending on your perspective.

I'll reiterate points I've made before: the effect of platform changes on aggregate metrics only makes sense to the extent that the privacy impact is uniform or approximately uniform. Topics is very specifically individualized and so appears to be far from uniform (a position supported by both papers).  Consequently, though the privacy impact of the API for most people might be modest, there are some for whom the effect is significant.

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