I have to ask. What were the last few RPG core rulebooks you bought (Main game book, not supplement)?
WHen were they published, how many pages are they, are they hardcover, and are they color? How much did they cost?
5-6 Years is about the average lifespan of a game edition. Shadowrun 1 (1989) to 2 (1992) was *3* years. Shadowrun 2 to 3 (1998) was 6 years. Shadowrun 3 to 4 (2005) was 7 years, but there was also almost a year that the game was "dead" and in limbo due to FASA closing, and nothing was being released. Shadowrun 4 had the Anniversary Edition (2009), but that was just a new shiny anniversary publication and not an actual new edition. So it's been 8 years since Shadowrun 4 was released at this point.