Well, okay.
Of course it is possible, since it is based on PHP.
From that point, of course i can somehow quick and dirty try to manipulate the url-manager, extend the core with hacks etc.
As you already mentioned: A single author uses facilities, but i don’t want anyone to do something in that case. Everything shoudl be “automagic”.
But you are right… so, does WP give me enough of the facilities?