[rwhaling]

Speaking as a data practitioner - data lineage is a profoundly hard and still unsolved problem.

In the last few years, I feel like we've begun to crack it - dbt's data lineage graph is a huge advance over anything I've ever used before:

https://docs.getdbt.com/terms/data-lineage

But in general - as an industry, we aren't there yet. All judgments about Meta's practices aside - no large organization likely has the ability to comply with a law like this without years or decades of engineering work, and the law seems pretty clearly intended for selective enforcement.