In this blog it has been written that Apache Camel will drop the Java 8 support in the mid 3.x versions:
Java 8 will still be supported for the first number of 3.x releases but is expected to be dropped later in 2020
How can I know precisely from with version the Java 8 support has been dropped? If I'm using Java 8, shall I work with 2.x Apache Camel versions or shall I work with 3.0 for example?
According to the FAQ (official) Java 8 is still supported with 3.x. If that changes they are bound to write it in the release notes. Furthermore you can always check the source. It is of course your choice, but I would go with 3.x.