[Sephr]

I wouldn't entirely agree. It doesn't change often enough, leading to easy fingerprinting scenarios[1].

1. https://github.com/WICG/floc/issues/4

[dialtone]

The link you posted examines the issue in detail, IP address on its own is already on its own a decent identifier at the household level, and used today, and that's why there is a specification on Willful IP Blindness proposed by Google.

But IP alone is imperfect as well anyway for tracking.