You lose security/privacy benefits. People in this thread pretend that there is one id type that is obviously better.

- UUID (all types) scale, sequential ids don't scale

- UUID (fully random) is completely secure and private. You cannot infer anything from it. As soon as you add anything to it ( like timestamp or counter), outsiders can infer things like how fast you are generating new objects

- UUID (fully random) cannot be abused by developers, which might skip creating timestamp columns and read it from the id instead

- UUIDs are slower, but as you see y's not for no benefits