Potential behavioral fingerprinting via cross-analysis of sessions. The more important point is that OP should not have to change their habits if a company is maliciously complying with regulation; the regulation should be tightened.

>Potential behavioral fingerprinting via cross-analysis of sessions

Isn't that going to happen regardless of cookie preferences, because the whole point of fingerprinting is to avoid cookies?

That doesn't mean we should throw surveillants free bones.