Scott, here is my humble opinion:
we don't need many styles, but we do need good ones.
Give me ten good 8 and 16 beat, ten good latin styles and ten good swing styles and I am set for the rest of my life.
Like you, I have scores of styles I have never used and never will.
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Korg Kronos 61 and PA3X-Pro76, Roland G-70, BK7-m and Integra 7, Casio PX-5S, Fender Stratocaster with Fralin pickups, Fender Stratocaster with Kinman pickups, vintage Gibson SG standard.