I kind-of like it, spontaneously taking tables from CSV files doesn't seem to be there (there's a mention of parquet via dataframes so perhaps it's supported implicitly, but maybe add that documentation?).

I see that import/export pipelines are there, so transform pipelines should be simple, and I guess that's a quick-n-dirty usecase it's there for (the spreadsheet part of "taco-bell programming" ala Dziuba ?).

Personally though for me often, the spreadsheet's interactive and quick recalcs is the important part, the exploratority quick checks with numbers updating, now if it can take arbitrary sheets and get out all "unstructured" calculations so one can edit them more properly later it's a win, or am I missing other major usecases?