If I remember correctly though, the only Roland styles you can add are strictly purchased styles directly through their portal. If you've got 30 years worth of styles from every major Roland arranger and converted styles from other brands, too bad.
It's quite the cash grab..! We haven't had to deal with a closed ecosystem since the early days, with extra styles having to come on a proprietary card.
For me, it's never been about the total style count. A couple of hundred 'world styles' are of no use to me. Likewise ballroom styles, 'freeplay' styles or anything like that.
But if there's only a couple of bluegrass, or only the one 'one drop' reggae, or a couple of rock shuffles, whatever, that's going to force you to use the same style repeatedly. That's a no-no in my book.
What's really disappointing me about the FP-E50 is that the features we want are mature, work well, are almost indispensable to the working musician, and have been DELIBERATELY omitted. Almost as if Roland have forgotten 30 years of hard earned experience in the arranger segment...
But that's Roland in a nutshell. Every model that came out felt like the team that developed it had nobody included from the previous team. Amazing features never got included in the NEXT model. Rinse and repeat.
We would make fun of each PSR or Tyros model being tiny incremental improvements, but one thing Yamaha virtually never did was drop a feature. What you used daily, what you had got used to was still there. Not Roland..! 🙄
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An arranger is just a tool. What matters is what you build with it..!