Ok, and? 7-10 years isn't forever, or at least certainly not long enough to negate GP's point about blockchain immutability being undesirable as far as account deletion is concerned.

Did I argue that point at all? Such immutable system will absolutely not be applicable to the EU and GDPR unless all the data is encrypted and the encryption keys are not part of the major chain.

A lot of firms that deal with personal data may even have snapshots of every single change, sort of immutable - just not global. Again destroying the keys solves the issue of the immediate erasure. The latter is often times impossible due to tape back ups.