When do we use parallel algorithms for enumerating combinations? I know that combination is used in many areas. But do we really need parallel version of algorithms for that? If so, where do they used?

Here is a famous example of parallel algorithms, Adaptive and Optimal Parallel Algorithms for Enumerating Permutations and Combinations by S. G. AKL.
I have found one.
A parallel algorithm for finding small sets of genes that are enough to distinguish two biological states

But if you found others, I would like to know.