'The world' in this case also includes a large portion of java programmers; it takes years for Java programmers to adopt new language features, if they do so at all. They're almost as bad as C++ devs.

And if you consider the history of Java as a language since the 1990's, it has historically had very slow feature releases. If you review the release history of Java, almost half of major relases and changes to the language came after 2014+. var in Java came out in 2018, record was introduced out in 2020 - feaures that were copied from other languages that already had them for years. Java as a language is still is playing catchup here.