Styles are probably among the things that most first time buyers and even some pros consider.
I know this because I did work in the retail Music for over 20 years, and if the arranger do not have the patterns/rhythms that appeal to the customer, he/she will buy only the arranger that provides those styles, that is to suit their "needs" and "wants" for the consumer.
Even in the arrangers "low" end, as an example, the ethnic group, like my Mexican customers that where looking to purchase an arranger ($100-200USD range), that if it does not have a "Cumbia" style, and as you know, the low end models on the Yamaha PSR line that does not have any, well, they purchase the Casios because they have it, and I heard that many times they may have said, "I like the sounds better on the Yamaha, but, does not have what I need/want".
In the medium to large arrangers, many customers are not aware of the loading user styles possibility, depending on the brand/models.
So, it is very important the styles issue too, unless the user plays only midi files, then, it does not matter.
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mdorantes
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mdorantes