...or virtual machines, containers, or even just defining valid groups in sshd_config. There is a whole multitude of ways of separating out SFTP users, it's rea

...or virtual machines, containers, or even just defining valid groups in sshd_config. There is a whole multitude of ways of separating out SFTP users, it's really not a hard job to do. Equally a lot of Linux FTP daemons defaults to using /etc/passwd users too. So What you're describing is a configuration detail the administrator needs to be aware of regardless of what transfer server they set up. In that regard FTP is no different from SFTP (or vise versa)