issue_comments: 825176507

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https://github.com/pydata/xarray/issues/1887#issuecomment-825176507 https://api.github.com/repos/pydata/xarray/issues/1887 825176507 MDEyOklzc3VlQ29tbWVudDgyNTE3NjUwNw== 5635139 2021-04-22T20:50:29Z 2021-04-22T21:06:47Z MEMBER

stack(new_dim=["a", "b"], dropna=True)

This could be useful (potentially we can open a different issue). While someone can call .dropna, that coerces to floats (or some type that supports missing) and can allocate more than is needed. Potentially this can be considered along with issues around sparse, e.g. https://github.com/pydata/xarray/issues/3245, https://github.com/pydata/xarray/issues/4143

 
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