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The xarray datasets is interesting alternative. The xarray still can be used in clients for multidimensional data sets, like time step X gamma bin X gamma rate.
In our use cases we need more complicate aggregation over model cells, and spatial voxels. It appeared, that 2D tables, SQL or alike join operation in Polars suite better for this.
Besides Polars provide high performance on data aggregation. So, we switch to Polars and DuckDB.