[Veserv]

The problem is that the filesystem primitives are garbage, so it is impossible to make something safe and reasonably performant. This is not a case of "speed at all costs" where huge footguns are added for marginal performance, this is avoiding 10x and up slowdowns that would be required to be safe due to the anemic primitives. If the filesystem had better primitives/APIs, like barriers and proper asynchronous completion, it would be trivial to design tools that are safe and performant. But, without them it is like trying to build a skyscraper out of mud and toothpicks.

[guappa]

To be honest, you sound like someone who has no experience with designing a filesystem and thinks he can do better because doesn't understand the problems at all.