I'm pretty sure I've seen Paizo folks saying the remaster was always planned, but the OGL thing made them move it up a couple of years and expanded the scope a bit (from just cleaning up the rules, also cleaning up various D&Disms).Iterative? You and 5E fans both. Kidding aside, the remaster was really just the right opportunity. For example, without the OGL fiasco, I dont think it would be happening right now.