Comment by JonChesterfield

If your language obstructs heterogeneous lists your programs will tend to lack them. Look for classes containing multiple hashtables from the same strings to different object types as a hint that they're missed.

Whether that's a feature is hard to say. Your language stopped you thinking in those terms, and stopped your colleagues from doing so. Did it force clarity of thought or awkward contortions in the implementation? Tends to depend on the domain.