What's not clear to me from the outside is how coupled these decisions are to the Java 9 release. Supposedly Java 9 is going to ship in less than three months,

What's not clear to me from the outside is how coupled these decisions are to the Java 9 release. Supposedly Java 9 is going to ship in less than three months, but you can't change major functionality in that short of a time frame. Or is there some way that you can defer work on Jigsaw/the JPMS spec without upsetting everything else?