“An undeletable cookie” seems seems like a contrived usage of the word “cookie”. That’s like saying an email login is an “undeletable cookie” because people typ

“An undeletable cookie” seems seems like a contrived usage of the word “cookie”. That’s like saying an email login is an “undeletable cookie” because people typically use the same email to login to multiple sites. Just like with an email, an address used for different websites can be changed and ether can be transferred to new addresses (in a way that reduces the chance of linking the old and new accounts) using mixers. With regard to data ownership, I wouldn’t say the requirement of that is linking everything you have to one wallet. Many people typically have a private wallet and a public one. One that’s used to publicly attest ownership of things for bragging rights and may be sued to link some sort of personal identity, and one that could be used solely for defi applications or tied to another social identity completely. Another cool thing about using wallets on the web is that it’s always been a design requirement to always obtain user consent when sharing address info and of course when making transactions as well. At the very least when you’re sharing your information it has to be intentionally done unlike with cookies that I can set on any visiting user’s browser (GDPR regulation doesn’t technically stop me from doing it non-transparently, it just has legal consequences if I do)