Should have been ZFS. :*^(
ZFS seems to be the most cross-platform of the modern filesystems. Although there's a Paragon driver for APFS for Windows and a FOSS driver for native Linux APFS as well as one for FUSE.
Personally, I keep track of bcachefs which got merged in Linux 6.7. But it won't be cross-platform.
... is:
"The COW filesystem for Linux that won't eat your data".
This is, IMHO, a dig at Btrfs, which is famous for recovery problems. Btrfs doens't have a working reliable `fsck` replacement or a working `df` command which gives reliable results.
So, bcachefs aims to be better than Btrfs and that's a low bar to clear.
It's "better" than ZFS because it's GPL and designed to do the same as ZFS but be integrated into the Linux kernel, which ZFS can't be because its license doesn't allow it.
For this it merely needs to equal ZFS' features and functions, not exceed them.