When 1.0 came out, I thought, "Well there goes Deadly Reentry, Kethane, FAR..." While DR and FAR are replaced pretty well by the stock system, the lack of a persistent resource map brought me back to Kethane. Then I remembered the goodies that came with, like the airless jet engine (how does that work without air, anyway?), the Soylent Gas, and the compatibility with Extraplanetary Launchpads. Long story short, go Kethane! Let's see how much it can keep growing!