You mean those that read product literature and listen to obviously biased so called 'experts'?

Or those with the skill to recognize a great sound when they hear it, and realize that that is more important than the latest 'gotta have' OS feature?

They are welcome to their 'home keyboards'...

There is some pretty sophisticated stuff in even these so-called 'old stuff' arrangers that has STILL yet to be implemented in newer arrangers. And, IMHO, some of these things are ESSENTIAL day to day operations that are almost left as afterthoughts on most of the rest... What's one of the non-playing things you do the MOST? Probably trying out conversion styles, older styles, user styles. What are you the most likely to need to do? Yep... edit them.

Roland make editing styles and SMF's by FAR the easiest in the business... A great sounding arranger, that is a PIG to make third party styles sound good on is of little use unless you ARE content to play the ROM styles forever.

It's the little things that matter...

Anyone that goes with a T3 or a PA2Xpro before they have even TRIED a Roland is missing an opportunity to try a different approach. One with many advantages. Sure, they are a little long in the tooth. But in many areas, the other's haven't caught up to THEM, yet. So maybe they are not THAT old stuff after all...
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An arranger is just a tool. What matters is what you build with it..!