it can run a complete Linux distro, no problem, so it can function as a server.
Great. So maybe this thing really is pretty secure out of the box. But if your going to stick something that capable\configurable on a business LAN, it is inevitable that some junior admin will be assigned to set it up and in the process create a gaping security hole. I have seen it happen on lesser devices. A secure router should have a limited set of well documented functions, not the ability to run Sendmail.
If I recall correctly it was Windows 3 that had a command to tile all open windows, which I used a lot, and Windows 95 that got rid of that.
Funny enough, I was discussing that very same matter with a co-worker last Friday.
ASHes to ASHes, DOS to DOS.