WELD-1819 Apply InterceptionDecorationContext optimizations to all ThreadLocalStackServices
WELD-1820 Eliminate HashMap lookups in ContextBeanInstance
WELD-1820 Generalize client proxy optimizations to all contextual instances
WELD-1820 Optimize for cases when RequestScopedCache is active
WELD-1820 Minor optmizations
WELD-1820 Make sure extensions do not register additional @Dependent or @ApplicationScoped contexts

The built-in ones are currently active always therefore the additional ones would never be usable