It used to be you could find a box of photos or keepsakes that you inherited to look back on how things were or when you were a kid. Now, most of that is stored on phones, and most parents probably don’t think to share or save them in a way to be passed down in the future.
Both BTRFS projects haven’t been updated in years. And the ZFS on Windows project has quite a few caveats, and it doesn’t look like there’s not much work or progress happening there.
Ultimately, I would never trust Windows with those filesystems. It can barely keep its own things stable, and running a filesystem as a userland process isn’t ideal.