Thank you for sharing. Intuitively I think your point makes a lot of sense. I don't think there's really enough data to really prove it, but I liked your approach.

I do think there's other stuff going on as well though. For example, newer languages are often designed to address perceived problems with existing popular languages. I'm a long-time Kotlin and Java developer, and Kotlin feels a lot like Java 2.0 - it specifically addresses a number of pain points people were experiencing with Java. So of course I'd rather be working with Kotlin, and going back to Java can feel like a drag.