Those who want to build Debian Linux systems for simple users may do so. The tools to do so exist. Some systems could be built for such users, some to accomodate NT admins. and yet others for and by UNIX admins.
BTW, I recently worked a contract for a corporation that uses nothing but NT servers and workstations. The machines were rebooted every two or three days, and complete images were installed to them once a week or more. Granted, though, the employees there were actually allowed to send and receive e-mail to their workstations via the Internet with no UNIX server to protect them! Art