Board Thread:General Discussion/@comment-86.142.253.158-20140811235307/@comment-3076833-20140812002145

Possibly is the most accurate answer you'd get out of this.

I think the one point that needs mentioning is that " the system requirements of the time" was no issue for MEIKO or KAITO as especially KAITO was very popular when Miku shot the Vocaloid name to fame, some reportadly even preferring KAITO over Miku due to his softer voice. So it wouldn't be entirely right to say that it was the software that's at fault at them.

The problem with the 3 is due to the fact that English Vocaloids are never popular to begin with, only managing to sell well enough for them to continue making them (Although this is solely based on the fact that we have yet to see one be announced as a failure). There is also the fact that the software in itself did no justice to their quality (Which is where the software fault lies, not because of what OS it worked on) which meant that Prima & FX Vocaloids were a better alternative due to their noticable quality.

Back to the question; would they do better if they were upgraded? It would all depend on demand for those particular voice types, which is the reason why Zero-G isn't upgrading them any time soon. For a company that is not Crypton it would take a big risk to update an old vocal mainly because sales from a new vocal type would most likely do better than a revamp of an old vocal that did alright in it's time. That isn't to say that it wouldn't sell but it's fairly obvious that a re-vamp of Miku would bring in much more profit than a re-vamp of Miriam.

TL;DR : If people were hyped over the original 3 as they do with Crypton vocaloids or even Internet ones there'd be a better chance of them doing well, but otherwise it's possible but much more risky.