That's because most video game players, even rpg fans, don't really care about the underlying systems. They care about the story and emergent play elements.It's interesting that the biggest legacy left behind from the D20 Star Wars era is the videogame Knights of the Old Republic.
Just about every videogamer I talk to LOVES that game and most everyone of them had no idea it was based on a TTRPG.
Hey, waitaminit...