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What if the object is deleted again? You could still have an inconsistent picture, no? And you could create and delete over and over again, so that a client has an inconsistent picture all the time.

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That's what eventual consistency is, isn't it? It's definitely not the easiest thing to design systems around, but at a big enough scale you sometimes don't have a choice.

There's also many ways to "work around it", so that it doesn't seem inconsistent to the user.

I'm definitely not arguing that it's how most systems should be designed though.

That's a different design issue then - it means lack of synchronization. It is orthogonal to using uuids at a client. In fact, (properly) using uuids are a reasonable way to resolve this.

Not arguing against using UUID. Just exploring that async concept further and the challenges in that. OK 2 separate issues : )

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