And if you’re not using Kotlin, you’re probably using Java for Android dev.
Java is the dominant platform for web services, and some companies including FANGs even standardized their whole infrastructure around it.
Also, Java is basically the default programming language in some degrees.
I don't think this is true. Java is an outstanding tech stack and was revolutionary in a lot of ways, to the point that it motivated others to shamelessly clone it and in the process create other outstanding tech stacks. See C#.
For starters, Java solved the deployment problem way before containerization was a thing. Developers could simply put together a fat JAR, drop it in a web server like Tomcat, and it would simply reload without a hiccup.
Java is also very tooling-friendly, and has a solid versioning policy.