Why is the dimensionality of a dense container limited to 1, 2, and 3? Any plans to support more dimensions in future?
The 1d/2d/3d dense containers are of common use in many applications, higher dimensions are more application-specific in terms of the memory layout and the look-up functions. Intel ArBB allows one to create own data structures to express such needs. For example, a 4d acceleration data structure is 4-dimensional but might not be dense.