I have utilized just about every feature on the S-950 and all previous keyboards, and still use most of them during every performance. I've modified styles, used all of the onboard programs, most of the voices, even some that I didn't like at all, mainly to hear how they sounded in a song.
I agree with everything Fran said - and most people are just too damned lazy to delve into the bowels of their keyboard to discover all that advantages that the manufacturers have provided for our use and improve our arrangements.
In fact, I know of several forum members that have never taken their user manuals out of the plastic bags they came in.

Cheers,
Gary

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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)