At a guess I would suggest the percentage in Australia is less than 1% of working muso's (that use arranger functions in performances).
Pub crowds out here tend to want their songs pretty much the same as the original which is why a lot use midi files instead of their own take on the song using the arranger..
Believe me I would rather play my own version of the tunes I play rather than the same old smf,(which is the main reason I spend so much time re-working them constantly...it would be quicker and easier to use the arrange functions!!).
But venue owners listen to the $'s in the door and if a performer doesn't play it the way the patrons want they are not re-hired.

Sorry that was a bit OT...Back OT, I think any new features are equally adaptive to either the home-user or the pro-user, and anything that gives more variety or ease of operation would be welcomed by both.
It would be interesting to know how many "home-users" are actually retired pro-payers?
D

[This message has been edited by miden (edited 01-10-2008).]