I had no idea that it was turning this Unixy until I read this thread.
The base system isn't Unixy at all. The shared-object thing is there to assist porting, which is the most realistic way of getting a reasonable amount of software available on Amiga OS. It's far from ideal, but how long would it take to write a complete office suite from scratch as a spare time project? Don't forget that the office suite will need compatibility with MS Office. Who would even take on such a project?
Hans