This is great news. Docker really screwed up v2->v3 and have continually suppressed Compose’s potential because it wasn’t inline with swarm. Looking forward to Compose getting some new life put into it.
Suppressed is not quite the right word.
Too many inputs (from the community) and not enough help managing and maintaining, and curating these inputs is really what this is.
That said, I don't personally believe there exists a single specification that can work (optimally) for both local-dev and production deployments.
Disclaimer: ex-Docker engineer, still an active maintainer on the main docker project.
You may recall that compose used to be called fig, and they merged into Docker. I wouldn't be surprised if there was some Us vs Them politics going on there.