The entire browser profiling angle refers to something that does not currently exist, does not conceivably scale well, and chases after an infinitesimally small

The entire browser profiling angle refers to something that does not currently exist, does not conceivably scale well, and chases after an infinitesimally small potential monetary gain This is where the tech industry is at though. All the low hanging fruit has been harvested long ago. The tens of thousands of devs in the Bay Area are building things that make "infinitesimally small potential monetary gain" because at web scale that's hundreds of millions of dollars. They might not be doing this particular thing, but they are doing something, so vigilance is necessary if you value your privacy.