Maybe Musk needs to learn about data normalization and natural keys.

I'm curious what the actual data looks like. I've spent quite a bit of time auditing large data systems.

I would expect these databases to be largely denormalized with very wide tables, I would expect them to favour natural keys like a SSNs, and built around per department use cases.

I would not expect them to be highly normalized because then when you need something from another department you need them to ensure consistency.

These systems probably have like 50 years of legacy code or more in them too.