issue_comments: 704647248

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https://github.com/pydata/xarray/pull/4484#issuecomment-704647248 https://api.github.com/repos/pydata/xarray/issues/4484 704647248 MDEyOklzc3VlQ29tbWVudDcwNDY0NzI0OA== 2448579 2020-10-07T01:59:59Z 2020-10-07T01:59:59Z MEMBER

Are there many other cases outside of xr.dot which only operate on DataArrays? If not, we could update that function to take a Dataset

I think we should do this. 

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