It was essentially killed during Google I/O (May 2017) when Google announced that it would add Kotlin as an official programming language for Android developmen

It was essentially killed during Google I/O (May 2017) when Google announced that it would add Kotlin as an official programming language for Android development. This gave Kotlin a huge boost in visibility at a time when a number of languages including Ceylon were competing as alternative JVM-languages. RedHat understood that and a few months later it was announced that Ceylon was being donated to Eclipse which was a euphemistic way of saying it was now abandonware. It's too bad because I personally preferred Ceylon over Kotlin.