The state of OpenZFS, BTRfs, and bcachefs?

So its been about three years since @wendell made a video regarding OpenZFS and BTRfs.
I know the two offer many similar features , and some of the key differences where that OpenZFS was vastly more stable and has usable raid5/6 support.

I was reading somewhere on the BTRfs wiki that Raid5/6 and it’s issues had reach some sort of usability
https://btrfs.wiki.kernel.org/index.php/Status

RAID56
Some fixes went to 4.12, namely scrub and auto-repair fixes. Feature marked as mostly OK for now.
Preliminary patches to fix the write hole have been posted.

However I also heard that Redhat has fully depreciated BTRfs and opepSUSE supports BTRfs in raid 1/10 modes during installation.

SO with

being three years ago, what has changed in your opinion?

Also has you used or heard of bcachefs?
https://bcachefs.org/

p.s. Im watching the ZFS video now.

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Bcache plus not btrfs and not zfs isn’t bad. Zfs is the one true fs though.

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ZFS is seriously going to be hard to beat. It was mature when btrfs was just getting started.