If Linux would just adopt NFSv4 ACLs, there'd be nothing mutually exclusive about it, but instead perfectly in tandem.

> even on the same NTFS filesystem

can you explain a bit how this works?

I think they use extended attributes in NTFS to provide the Linux file system permission.

https://docs.microsoft.com/en-us/windows/wsl/file-permission...

That was WSL v1. WSL v2 is a full blown VM and the filesystem is native ext4 and lives in an image file.