The planned releases for removal are listed on the JEP.
If they fail to provide parity, people will do like with modules, keeping holding to older Java versions longer than they should, use the escape command line options if available, turn back to JNI (the opposite this is trying to achieve), or move to other stack if they aren't that dependent on Java, e.g. ongoing Kafka ecosystem evolution.
If they fail to provide parity, people will do like with modules, keeping holding to older Java versions longer than they should, use the escape command line options if available, turn back to JNI (the opposite this is trying to achieve), or move to other stack if they aren't that dependent on Java, e.g. ongoing Kafka ecosystem evolution.