F2FS had been emerging in the embedded world a bit and generally proven to be stable. I think there's a few Android handset vendors that may be using F2FS on the flash memory of some phones also. Overall it was shaping up to be a well-adopted filesystem.
Then some time later, Microsoft randomly granted royalty-free use of exFAT under Linux, and I don't know if that took any attention away from F2FS maybe.

Last thing on filesystem news to keep an eye on is bcachefs, which has plenty of the selling points to ZFS and more, and no CDDL license issue, and may soon get mainlined in a year or two.

XFS itself doesn't offer data checksumming, only file metadata checksumming, when comparing it to ZFS; but XFS vs ext4 is probably a fair comparison. There is also Stratis, which makes use of XFS, to build software RAID with a goal to be a ZFS alternative.
https://stratis-storage.github.io/