What I find really weird is that after using it and having it be successful, no gaming company has stuck with it. I recently found out that BioWare is removing New Game+ from Mass Effect 2, after using it for Mass Effect and Neverwinter Nights.

I've seen New Game+ in all sorts of games (most of which rate high in my top games of all time), but every company seems to use it once and then dump it. Why has a feature that has been out for twenty years not only not picked up force with the whole gaming community, but has been abandoned by the companies who have used it?