Hey all, TL;DR: Development of SDF ecosystem (transitioning existing connectors to SDF, building libraries, battle-testing the API) is currently blocked on having SDF supported at full parity with Source API in all Beam runners, which will take a long time.
But we can unblock all this work and start doing it very soon, by running a special case of SDF on top of the Source API. I think this is very exciting. Please comment on the following short proposal! https://s.apache.org/sdf-via-source After getting some consensus on the doc and in this thread, I will start filing a network of JIRAs and follow up with next steps.
