I simply feel that some people, once they have found what works for them, prefer to spend what time they have on MUSIC, rather than trying to figure out how to do what they already know how to do on something newer, and more different.

At the end of the day, the audience doesn't really give a rats whether you have ONE latest greatest TOTL keyboard, or a bunch of older pieces of kit. For some strange reason, the only thing they care about is the MUSIC it makes. Well, that and the girl or guy they are with!
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An arranger is just a tool. What matters is what you build with it..!