> You didn't answer the question. You can't claim that there are simpler solutions then not actually provide a simpler solution. And what was would be a reason

> You didn't answer the question. You can't claim that there are simpler solutions then not actually provide a simpler solution. And what was would be a reasonable response to you? Pasting a novel filesystem implementation as proof that the existing ones are overcomplicated? Opinions do not have a burden of evidence. There is a handful of CoW filesystems out there, showing that it is certainly not an insurmountable issue to write one. Rather, the problem is stopping people from doing more at this point, keeping the design simple instead. That we don't have something better yet is likely a result of writing filesystems in general being rather laborous to do right regardless of CoW, and being incredibly unrewarding - few care about filesystems unless it's broken.