I keep reading about arranger players with excessive libraries of thousands of styles Onboard their KB's, or where ever.....etc, etc,...

Personally I only use about 30 styles for all my work as a pro platyer on stage most are tweaked & edited by myself to suit my tastes,....I can pretty much do any song I need to with these excellent styles,......
Why would anyone need hundreds & hundreds on board?
It just puzzles me?