OSGi allowed you to specify in excruciating detail what dependencies you had, whether API (i.e you wanted to re-export types from another library) or not, and m

OSGi allowed you to specify in excruciating detail what dependencies you had, whether API (i.e you wanted to re-export types from another library) or not, and much more. Unfortunately, it became far, far more complex than just implementing a simple module system, so as most things from the era (early 2000's) it became a huge, complex beast no one wanted to touch anymore.