It's unfortunate that fuse-t follows the same closed source model as MacFUSE did. It's really holding things back.
I was hopeful that Ganesha NFS [1] would suffice as a bridge for the various FUSE filesystems I need to use with macOS, but alas, they have abandoned the FUSE interface and moved to FSAL/FSAL_VFS [2].
It would be really nice to have a clear path to building a copy of Ganesha NFS that supported a whole host of the great FUSE filesystems out there built to this API.
[1] https://github.com/nfs-ganesha/nfs-ganesha [2] https://github.com/nfs-ganesha/nfs-ganesha/issues/759