The scope of changes in dev09’s edition of the Compose UI libraries is extensive. And the release notes do not cover everything, such as the new ui-text-android and ui-text-core artifacts.
dev10 promises to be a big release as well, as we may get a new compiler plugin to try out. Yet, it appears that this is still an interim release of the plugin, with not everything working quite yet (e.g., working with Flow from coroutines).
All of this suggests that we are quite a ways away from an alpha of either Compose or the Compose UI:
- I would not expect an alpha of Compose until the compiler plugin is reasonably feature-complete and out for a while, so we can find lingering problems
- It is possible that Compose reaches alpha before Compose UI (though the reverse seems less likely), as there is no strict requirement that the two reach alpha simultaneously
On the plus side, this indicates that Google is taking its time and trying to get the first edition of Compose to be as good as possible. On the other hand, there is a minor risk of losing early adopter enthusiasm, as developers tire from the rework required to keep up with all the dev-release changes. On the whole, the pace seems like a positive thing, though. As they say, patience is a virtue.