Why developers are not using latest java versions?

Why developers are not using the latest java versions?

 The majority of us are still using Java 8 (announced in 2014), whereas Java 19 will indeed be released in September this year and Java 20 in the March of the coming year. Some ambitious projects have shifted to Java 11 (2018).

But why do we rarely hear of anyone in the industry adopting the Later version?

The only LTS (Long Term Support) versions of Java are these two( 8 & 11).

Therefore, no enterprise would adopt a version without an LTE, making versions 8 and 11 the most frequently used and stable.