I think it's useful stress testing for when your product goes viral. For example, if the whole world wanted to create an account, and an account consisted of a

I think it's useful stress testing for when your product goes viral. For example, if the whole world wanted to create an account, and an account consisted of a UUID and a date, it'd take 5.4 days using this metric as a minimum viable benchmark. It's all about context, perception. 15,000 seems like a large number, and 1 second seems like a small amount of time. On the other hand, 5.4 days seems like quite a large number. Likewise at small scales, 15,000/second operated at a fidelity only able to capture 0.0005% of a typical processor's clock. Like a picture in a frame. This is not to say that the ability to casually write 15,000 things a second to a database is not impressive. Nor that a beowulf cluster of it wouldn't be.