So my friends over at the npub17c628zt8jlwa2r3f47kthycmu9x0g5ahhu026ect4yy08efeyt5ql40plj (npub17c6…0plj) wrote a Finding on third-party cookie depreciation. TBH, I'm disappointed, but the good news is that could still be fixed with some targeted additions (and a bit less grandstanding).
I lay out the case here:
https://infrequently.org/2024/07/misfire/