Multi select filter dimension creation

[GautamR-Samagra]

From our understanding, separate json files are created for each combination of dimension in which data needs to be visualized and there is no querying layer as such for viz.
How does this work with multi-select filters?
Are json files created for each combination of multi-select filters?
This seems to significantly blow up scale of data stored. For each 'feature/column' there are $2^{n}$ -1 combinations of multi-select filters available where n is the number of categories in that column.