UnlockCommercialFeatures flag does not work on Ubuntu in latest JDK 8.
It works on windows.

$ jdk1.8.0_192/bin/java -XX:+UnlockCommercialFeatures -XX:+FlightRecorder HelloWorld
Error: Trying to use 'UnlockCommercialFeatures', but commercial features are not available in this VM.
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

$ jdk1.8.0_192/bin/java -XX:+FlightRecorder HelloWorld
Error: Trying to use 'FlightRecorder', but commercial features are not available in this VM.
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

This is a regression, as it used to work with older JDK 8 releases (like 121).
As a result commercial features are not working.