Why would I ever use a UUID PK if I had the option to use a serial one instead?
People do it, but seems like you get it. Every time I'm on a new team or job, they have UUID PKs in a single DB for no reason.
It's because it's opaque. Signing up and seeing a page like `/companies/366` unnecessarily leaks company data. Sometime it's a huge deal, sometimes not; not here to litigate that. But it's trivially avoidable.
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