The Microsoft Corporation's 2006 Best Practices for Creating DLLs whitepaper laid out some actions that cannot reliably be safely be done from DllMain or the module initializer and finalizer routines due to limitations of the Windows platform. These bad actions are provided as opaque "rules" (as some refer to them as) that one must not break with no explanation as to why or the root cause. The intention for rewriting the rules for DllMain is to turn the tables on the operating system: to find out what went wrong to make module initializers and finalizers so hopelessly broken on Windows.
Be mindful of the fact that my critiques apply only to the software or company itself and not to the people who contribute to its development. I appreciate and respect the people who put hard work into creating the technologies. Thank you!