Mathematica 10.2 contains a few new functions that test set containment:
ContainsAny and a few others. The documentation mentions that these are equivalent to existing functions like
SubsetQ. The only difference I can see is that the new versions support operator form, but that surely could have been added to the existing functions instead of creating new redundant ones.
Why do we need these new functions?
What differences are there between
ContainsAll(whether they seem to warrant the introduction of a new function or not)?