Multiple module versions was one of the single greatest advantages of OSGi. I don't understand why this was considered a non-requirement except because it was a

Multiple module versions was one of the single greatest advantages of OSGi. I don't understand why this was considered a non-requirement except because it was a "difficult" problem... which OSGi had resolved. Module isolation should actually mean that you can have multiple versions of a set of classes (a module) available in the system (JVM process) and each gets their own classloader. Dependency expressions permit the deterministic wiring of these classloaders to each other... Simple. Why wasn't the OSGi spec imported (at least in part) again?