So...how many styles do you need?
Well, I bet most of us use maybe 50 styles total?
What's important is whether the ones you like/need are there.

Same goes for sounds...give me 100 top notch sounds that don't have damm problems with them...don't need 1,000 sounds.
How many sounds are in a full orchestra + an average band...
Add different pianos, E-pinos, some ethnic stuff...100 wound be enough if all of them were top notch and useable for lots of songs.

To me quality is more important than quantity.
Lee S.