It moved away from 0.x around 6 years ago
React Native is still 0.x, since 2015!
> Major version X (X.y.z | X > 0) MUST be incremented if any backwards incompatible changes are introduced to the public API. It MAY also include minor and patch level changes. Patch and minor versions MUST be reset to 0 when major version is incremented.
> Major version zero (0.y.z) is for initial development. Anything MAY change at any time. The public API SHOULD NOT be considered stable.
We use even minor versions for LTS releases (e.g. 0.22.x) and odd versions for dev releases (e.g. 0.23.x). Kill Bill is very much stable now :-)
Apache Kafka was named after Franz Kafka, who lived as an author in turn-of-the-20th-century Austria. Like the project named after him, he was slow to start, inconsistent in delivery, and left a mess of unpublished work after a tragically early death.