I began this as an answer to a question then took off on a general consideration.
I don't think the move to include asymmetrical core shapes was sudden. If anything it was a slow methodical move. Production is based on demand and demand is based on perceived value. Strong asyms have a high market value. Every producer of balls wants to be the worlds largest seller. You can't fill a demand with products you don't have.
I could be wrong but, I think the Centrifugal Mass was Phils' first asym shape. And the CM was a really well received first entry into this market.
I am thinking that asym design is not new because tinkering with flip blocks, core densities, as well setting the core off center and at various degrees of angle is a form of asym design. The basic light bulb shape is a perfect example of the root of asym design because so much as been done with it. How the core weight distributed in the ball defines asym design.
We are seeing all of the companies experiment with core shape, and the way core shape alone influences hook shape and roll. Does this make sense... Single density cores are easier to produce, and it is easier to produce a ball that has a desirable alignment of the pin, CG, and MB, if a single core material is used?
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OnlyBowling
