Just because a new edition of a game comes out doesn't mean that everyone gives up the older edition. There are many out there that still play and enjoy them. Take Pathfinder, for example. If you've got a group that's been playing for a while, you might want to stick with the 1st edition. Or, you might just not like what 2nd edition brought. Either way, it also doesn't mean that nothing new will come out for the game. Take, for example, Ascension Games' Path of the Wilds book that's up on Kickstarter now.
From the campaign:
Path of the Wilds is the next book in the "Path" series by Ascension Games, aimed at bringing new, exciting, and balanced material to the Pathfinder Roleplaying Game (1st edition). Following in the footsteps of our last two books, Path of Shadows and Path of Iron, this book will cover nearly every aspect of the Pathfinder Roleplaying game, with dozens of feats, spells, magic items, archetypes, and options for your favorite classes, along with three new base classes for you to play.
The campaign is up and running now with 18 days left to go.