While the threaded libraries are now not installed by default for all OSes, they can be added if you customize the installed components. They are still available if you need them. However, using the non-threaded versions of the libraries is recommended. Use of the threaded libraries can result in oversubscription. Threading inside the primitives is also not cache friendly. By working with small ROIs and chaining operations in your application you can reuse cached data and obtain better performance than by using internally threaded primitives.
