For multi-index columns,it colud be translated to column groups, but it would be limited to 2 levels maximum…
For editing purposes, I believe converting the data to long form and using grid’s filtering/group selecting features would be better way to handle n-dimensional data.
Displaying a table with many colums usually leads to poor user experience. In my opinion, it’s natural for tables to grow vertically instead of horizontally. However, every financial model spreadsheet that i receive on my job have horizontally expansion… so i can imagine the use case for a multi column grid. What is your use case?