Anyone who believes OSGi is good is either (a) deluded or (b) ignorant.

Having just implemented a plugin solution using it I can safely say that in the past 20+ years of software development it is the most awful technology I've ever seen. The complexity and over engineering is simply breath taking. It is worse than EJB 1.0, worse than the crazy abuses I have seen with Spring and DI, worse than than dark days of J2EE.

I have lost a lot of respect for Red Hat and IBM after this.