pitrou commented on PR #39200:
URL: https://github.com/apache/arrow/pull/39200#issuecomment-1852837973

   > The operation declares that it can receive int32 and all logical types 
defined in terms of int32 (like `IPv4`).
   > 
   > `sort(array<int32>)` can also work as `sort(array<ipv4>)`, but `sum(int32, 
int32)` can't.
   
   Yes, but the problem here is another extension type based on  `uint32` would 
also inherit the sort behavior even though it might want a different definition 
of ordering.
   


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