I don't see why there is an issue that Roland haven't publicly indicated they will update the VS-700 system.
Some people bought their units new just a few years ago, and it would be a total failure for Roland to give up support for drivers for the 700 system so soon. And especially for this Windows 10 OS that's touted as the best yet for audio processing.
From what I've heard it only takes minimum changes from 8.1
The unit is less than 5 years old.
Roland please make VS-700 Windows 10 drivers so we can better utilize our investment.