[tomhoule]

Thanks for clarifying that the plan is to stop relying on it :) Is there a specific place/issue/ticket to discuss this? If time allows, I would be interested in helping out.

[lordsunland]

There is https://issues.apache.org/jira/browse/ARROW-6717 tracking moving to stable Rust, and https://issues.apache.org/jira/browse/ARROW-4678 is also relevant. Feel free to create a sub-task under the former to remove specialization :)