Board Thread:Off-Topic Discussion/@comment-6433273-20180322113157/@comment-53539-20180415183759

Usually there is a transfer period wherein data from old engines can be imported into newer, so V3 would be good for approx. 2 years after V5's release. But... Bare in mind the V3 engine will be about 3 years old by then. :-/

There be a period wherein old V2 vocals can drift over, but only if imported into V4. No flat out V2-V5 like in the past. So unless you have them in V4 at this point, the V2's are long forgotten. Their unsupported anyway.

My biggest issue when V3 is retired is that there are many more vocals for it then V2. So there is a lot of vocals we could loose if their not updated. I can't imagine all will.