[habitue]

I mean, bcachefs is basically the equivalent of rewriting all that code, without explicitly trying to be a clone. Same for btrfs

[bluGill]

And how hard it is proves that zfs didn't make a bad choice in not trying the same. (though it would be interesting if either had a goal of a clone - that is same on disk data structures. Interesting but probably a bad decision as I have no doubt there is something about zfs that they regret today - just because the project is more than 10 years old)