I'm surprised the author calls out that knowing the pk before insertion is useful, but doesn't once mention idempotence as a key benefit. If you are building m

I'm surprised the author calls out that knowing the pk before insertion is useful, but doesn't once mention idempotence as a key benefit. If you are building mobile apps that sync state, UUIDs make your life so much easier. Optimistically perform writes locally, then perform writes remotely and retry on exponential backoff in case of a network error.