Well, I was thinking about it, and basically... V4FE has everything to be considered "homebrew" since it is a version that allows you to add homemade or unofficial voice banks (that's what homebrew means) and at the same time, it is used for things that are not very legal, really, as a homebrew system, it is useful, I mean, there are many unofficial voice banks that are quite interesting, but it is something very debatable, since VFE was created for illegal things, but it is interesting to think about the legal part, such a free version can give us many possibilities.