Perhaps this is the very reason why I personally am VERY RESISTANT to rushing into upgrades.
I am still running version 1.8 of the RasterLink software that was loaded on my JV-33 some two and a 1/2 years ago.
I have never had to replace a print head, and the only maintenance I have done is the replacement of the dampers after two years of almost flawless operation. Mimaki builds a great piece of equipment.
It runs flawlessly, gives me the printing results that I and my customers are satisfied with, and I don't have problems with any of my electrical or mechanical parts NOT communicating nicely with each other.
Why would I want to break a cardinal rule? {If it ain't broke, why fix it!}