kylebarron commented on issue #4472:
URL: https://github.com/apache/arrow-rs/issues/4472#issuecomment-1779894768

   My interpretation of this is that it's a "zero-sum" architecture decision, 
in the sense that if you don't want to conflate logical and physical types in 
the `DataType` enum, then there's intentionally no way to implement `From` on 
`&dyn Array`; instead it's only possible to implement it on `(&dyn Array, 
&FieldRef)`


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