mbrobbel commented on issue #8030:
URL: https://github.com/apache/arrow-rs/issues/8030#issuecomment-3215212375

   I agree it would be nice to remove the experimental warning. There is one 
thing I've been thinking about that we may want to change: currently when 
adding an extension type to a field via 
[`Field::with_extension_type`](https://github.com/apache/arrow-rs/blob/76b75eebc50466c4726d93107791ac44f07df313/arrow-schema/src/field.rs#L499-L543)
 we check that the data type of the field is supported by the given extension 
type via 
[`ExtensionType::supports_data_type`](https://github.com/apache/arrow-rs/blob/76b75eebc50466c4726d93107791ac44f07df313/arrow-schema/src/extension/mod.rs#L250-L252).
 However, the data type of a field can be changed via 
[`Field::set_data_type`](https://github.com/apache/arrow-rs/blob/76b75eebc50466c4726d93107791ac44f07df313/arrow-schema/src/field.rs#L369-L381).
 This means you can construct fields with invalid extension type information 
(the extension type in the metadata does not support the updated data type of 
the field). I'm not sure what the best way is to solve t
 his yet, so I don't know if we even need a breaking change to fix it - if we 
even want to "fix" this.


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