With FLoC being deployed to Google Chrome automatically, browser fingerprinting (and therefore tracking users across the internet) becomes even more powerful than it was before.

At least there are some tools that help us fight it, namely EFF's amifloced.org and the DuckDuckGo's wonderful privacy extension now blocks FLoC.

The irony of this is that these tools will be mostly used by power users only. So the regular users will be tracked even better because of FLoC and power users probably can't easily defend themselves against fingerprinting because their settings are so unique that fingerprinting their browser is a piece of cake. A great example of divide and conquer!