Amazing how broad or narrow the definition of an 'arranger' becomes when one wants to make a point..!
For instance, Ian contends that Yamaha don't make 76 note arrangers, despite the DGX's and NP-80v being obviously those. They are, without a doubt FAR closer to the arrangers that you and I play than a MoXS/F. But Ian will deny it three times before the cock crows, so he doesn't have to acknowledge that Yamaha, far from not making them, simply make really BAD ones. So they are magically transformed into 'home pianos' with arranger capabilities, as if every 76 and 88 note 'true' arranger (true, in that Ian is willing to accept that they ARE arrangers
) aren't exactly the same... big keyboard, great piano sound, full keyboard chord following. What's the difference between a DGX and a PA2X? NOTHING other than their basic capabilities (due to pricing, not anything else).
And, having a quasi-chord following ability (no-one has really bothered yet to point out that arps don't revoice chords... rather than figure out what chord you played, they simply follow what NOTES you play and slavishly play them all - a far cry from the chord recognition abilities in an arranger) seems to be enough to make the XS into an 'arranger'...
It just seems that you got yourselves stuck in an untenable position and decided to dig your heels in. Nobody agrees with you. So you end up retracting or repositioning everything you said, to somehow excuse the simplistic point you started to make in the first place.
To call something an 'arranger', even a substitute for one, it has to have a LOT more than simple chord following. Could you substitute an XS for an arranger? Depends on what you are doing. You can use a home organ to substitute for an arranger. Doesn't make it one. You can use a piano to substitute for an arranger...
after all, if you are just playing a piano part, they are as good as each other!
But that doesn't make it an arranger. As I said, if you want to OWN the definition of arranger, you can make it anything you want. But there's a clear consensus on this thread that, despite your retractions and redefinitions, no-one even remotely thinks the XS/F series is an arranger, or even has contemporary arranger capabilities in any form at all.
I'm afraid you've come pretty close to saying that the XS has black and white keys, an arranger has black and white keys, they MUST be the same thing
And, who can argue with THAT..?