It adds a lot of overhead at any scale, it’s just that the overhead is hidden due to the absurd speed of modern hardware. I’ll again point out (I said this els

It adds a lot of overhead at any scale, it’s just that the overhead is hidden due to the absurd speed of modern hardware. I’ll again point out (I said this elsewhere in a post today on UUIDs) that PlanetScale uses int PKs internally. [0] That is a MASSIVE distributed system, working flawlessly with integers as keys. They absolutely can scale, it just requires more thoughtful data modeling and queries. [0]: https://github.com/planetscale/discussion/discussions/366 https://github.com/planetscale/discussion/discussions/366