Well if it so easy to do then why does Arturia do it? Most likely because it is not revenue generating. The manpower spent on working on a free update could be spent developing new products to make money. What I find so baffling is that if like you say, it is soooo easy to do, then how come it was not implemented with the V2 versions?
?? I have no idea why Arturia and other companies openly resist going to 64 bit other than for the cost. What else can it be?
As far as the benefits from using 64 bit, it is you who needs to understand what 64 bit means. Running 64 bit removes the limitations on memory which means studios will be able to run more, faster. In fact all comuptations and data transfer that the computer does will be twice as fast. It has NOTHING to do with the sound.
Also, 64 bit is soon going to be the norm, it certainly is in my studio. And as we all know in the professional music industy, time is money so if you can do it faster, then it will be cheaper and will mean more profit.
If Kontakt 4 was not 64 bit, I would have a great deal of difficulty using it as I would quickly run out of memory. J bridge is nice but ACT does not work through it and I do not wish to have to run some controls under midi cc and not the more advanced automation because the company who made their software is unwilling to do a simple update...after all you yourself stated it was very easy.
So to run the Arturia stuff I would have to go to 32 bit and then I could not run Kontakt to the fullest. I chose Kontakt and the future. The Arturia stuff now sits collecting dust until I either find a 64 bit replacement or Arturia gets with the times and goes 64 bit. I have already bought some of the 64 bit LinnPLug stuff and it I might be replacing Arturia soon because this LinnPlug stuff looks quite good. Too bad because the Arturia stuff is quite good sounding, it is just not compatible with the new standard yet.