The release date of Java 8 doesn't matter. Nor does the fact that they're working on Java 11 (which is only because Oracle just started doing fast releases).
What matters is when Java 9 became available. I.e. how much have they had to migrate from Java 8 to its first successor: Java 9.
Java 9 is available since summer 2017. So that means companies will get only 1.5 years to migrate all of their Java 8 apps to the next available version. Which is very, very little for large organizations who may have many hundreds of apps running on Java 8.
What matters is when Java 9 became available. I.e. how much have they had to migrate from Java 8 to its first successor: Java 9.
Java 9 is available since summer 2017. So that means companies will get only 1.5 years to migrate all of their Java 8 apps to the next available version. Which is very, very little for large organizations who may have many hundreds of apps running on Java 8.