Telmo's dedication to getting the most out of his T4 isn't typical, and, to be fair, if a Korg or Ketron or Roland were demoed in this fashion, the Yamaha evangelists would be all over it, saying 'this isn't what comes with the arranger', blah, blah, blah, yada, yada, yada...
Saying something like that Diki, is hardly being "
fair", as you are
assuming people would act in a certain way, or perhaps
the way you might act (point your finger...three point back

)...so, until Korg or Roland actually
do a demo in the fashion you described, you are making an unfounded, and unfair statement about Yamaha users.
But, that's seems to be par for the course for you lately.

Ian