[onemoresoop]

That looks like a different type of writing, perhaps research or business writing. Wordstar like editors that bring simplicity and a distraction free environment are best suited for creative writing.

[wodenokoto]

A large fantasy adventure could easily have supporting documents with cities stats, characters, races, maps etc.

[taffydavid]

It could have, but George R R Martin famously uses Word Star and he surely has all that.

Then again he's also about a decade late with the next book