There are times when technology changes and becomes more and more affordable, so that more and better is possible. Arrangers are just pieces of technology and eventually they will change, just as they changed compared to let's say 15 years ago.
To me, it would make perfect sense to move it all in the software realm already! Exactly because most of the expenses are software related, why not turn it into computer programs that can be then targeted, modified, adjusted, etc very easily to suit each user really. I wonder, as I did many times before, who and when will take the plunge and come up with a completely software arranger, just like Dan did with his vArranger, which became it seems a very appealing alternative!
Then, one will only have to worry about the computer hardware that will best accommodate its needs.
Prefer that or that keybed? NO problem, you buy what you want. Need that screen or that screen? Larger? Smaller? There it is. Prefer western music? Eastern? Pop? Balkans? You just acquire the preferred packages and you're good to go.
I think was about 2 or 3 years ago when I gave it 10 years until we see it... I wonder...