> nobody relies on function runtime Maybe not intentionally. But there have been several times where I've seen bugs where two tasks are done concurrently, but

> nobody relies on function runtime Maybe not intentionally. But there have been several times where I've seen bugs where two tasks are done concurrently, but task A always takes longer than task B, then someone makes A faster, and that exposes some race condition or deadlock that only occurs if A completes before B.