Probably because I don't need nor use VTT is my games, as I play at one of those rare live tables. I have looked at VTT though. I even picked up Fantasy Grounds once, though installed on an older PC, I don't have anymore - maybe I can prove ownership and get a new download. I've played with MapTools since it's free, though some of the more special featuers require some Python programming, which is not in my wheelhouse, or at least not in my interested box. I've looked at Roll20, just because everybody seems to use it. If I were more code-inclined, I'd probably prefer MapTools. But as stated, I don't need VTT, so it impacts me very little.