Lies sold by Google.

Nokia and Sony Ericsson were using J2ME perfectly fine, as did Blackberry. I should know ad ex-Nokian.

Kotlin met nothing, it was pushed by Kotlin heads working on Android Studio, telling lies comparing Kotlin to Java 7, instead of Java was already offering at the time.

To this day they never do Kotlin vs Java samples, where modern Java is used, rather the version that bests fits their purpose to sell why Kotlin.

Fragmentation, what a joke, the fragmentation got so bad in Android, that JetPack libraries, previously Android X, exist to work around the fragmentation and lack of OEM updates.

Gosling said it better, regarding Google's "good" intentions

https://www.youtube.com/watch?v=ZYw3X4RZv6Y&feature=youtu.be...

J2ME was an alphabet soup of incompatible implementations stuck somewhere between Java 1.2 and 1.3. Getting code to run across device manufacturers was a huge engineering burden. In fact doing something like JetPack for that world would be technically impossible.

If Sun was offering some technically relevant foundation for the smartphone era, it would have been able to actually have some adoption. They were starting from a leading position (obviously - see blackberry or Nokia), and in the space of 3 to 4 years they completely disappeared.