Is there a reason why native_tls_alpn is not default?

[Jimmy-Z]

Is there any drawback?

[seanmonstar]

The way the feature works in native-tls, if enabled, the support must be available at compile time. OSes that didn't support it cannot work if we enable the feature (I think that's macOS 10.13). So we don't enable by default.

There's nothing wrong with you enabling it, as long as your workflow allows it.

[Jimmy-Z]

Thanks for the explanation.