Enevhar Aldarion
Hero
A lot of average gamers do not have the crazy amount of free time to play in several games a week, the way some posters here seem to have. So if someone has time for two game sessions a week, or alternating every other week, they are very unlikely to pick two systems that cover the same genre. And the vast majority of players seem to be choosing 5E D&D for their fantasy needs. This is why something so different, like Call of Cthulhu or Vampire or whatever the current hot sci-fi game may be or the future Marvel RPG, will not be hurt by the success of 5E. Those are more likely helped because of the difference, while systems in the same genre were not. I would guess that Pathfinder 2 and WFRP 4E would have been bigger successes if 5e D&D were not as good, and people needed to find a substitute, like how Pathfinder 1 was such a big hit because 4E D&D sucked so badly.