I'm not sure what you mean by this?
Google Ads has committed "once third-party cookies are phased out, we will not build alternate identifiers to track individuals as they browse across the web, nor will we use them in our products." -- https://blog.google/products/ads-commerce/a-more-privacy-fir...
> even if wrapped in something like FLOC
FLoC doesn't allow "a few actors [to] obtain competitive advantages by collecting data from across websites" since everyone sees the same number of identifying cohort bits.
> other parties like KISSmetrics will continue the fingerprinting cat and mouse game
Historically, the TOR browser was pretty much the only one that took fingerprinting prevention seriously, but it's now a substantial focus for Safari/Firefox/Chrome. I do think fingerprinting groups will continue to have things that work when third-party cookies go away, but I don't expect it to persist that long after? I also would not be surprised to see a regulation here, since I (not a lawyer) don't think fingerprinting is compatible with the GDPR or the other regulations it's inspiring around the world.
(Still speaking only for myself)