Unfortunately, supporting the async/await paradigm would require a huge interface change, since many functions would need to return Tasks. But since we would need to maintain backwards compatibility, these would actually be an entirely parallel set of interfaces. I haven't heard any plans to modify Repository Access like that in the near term.

I think though that it's become clear the async/await is the paradigm to adopt for new work, so I would hope we could incorporate it into any new SDK libraries.