The upside to software dev is that with the long period of time it takes to code something AND that it takes a few weeks to months before a piece of content is released ... I wouldn't be stunned if there were at least 1-2 more pieces of content that he was involved with.
In addition, as a dev, he probably shoehorned in something like Jambon into the came (ie: a raven that has some weird dialogue or his Jmod avatar standing guard somewhere plotting and scheming to destroy the universe ... fairy ring to a behind the scenes location where his jmod avatar is still trying to pitch "raids: the musical" to Mod Elfbourne while the Jmod Avatar of Mod Maz is still trying to pitch Fossil Island)