Posix acls aren't particularly nice though. RichACLs is what I'd love but they're not merged :(
Linux NTFS support is useful for that. It doesn't support them so you can just access/nuke any files you want through it even if Windows won't let you.
That's true of every file system if you're willing to boot into a different OS instance.
That's true. But NTFS could also improve rather than simply adopting Linux's filesystems. Heck they could improve it then Open Source the new thing.
I think ReFS was supposed to be the next-gen version of NTFS, but it never really got much use.