Yes, I have thinking about it. The major issue why it not implement it - it take also views, so you got 2 extra columns in grid. In additiona to at least one dimension you will get 3 columns so near 1/3 of grid space will occupied by row header.
Personally I think it is not very usable. But we have such plans nevertheless, due to customer requests.
Best regards,
Alex Zencovich
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