Because it would accomplish nothing. What's the point? It's not more simple and there are no benefits WRT reliability. "I think this would be a benefit, becaus

Because it would accomplish nothing. What's the point? It's not more simple and there are no benefits WRT reliability. "I think this would be a benefit, because first you don't need userspace developers dig into the gory details of dirent metadata durability" This is what libraries are for, not syscalls. The problem here is you're mixing up two unrelated concepts: Durability and atomicity.