ETL is the bread and butter of the company where I work and you can be sure Java is not even allowed near our systems. We have thousands if not dozens of thous

ETL is the bread and butter of the company where I work and you can be sure Java is not even allowed near our systems. We have thousands if not dozens of thousands of different data providers and it is mostly financial data. Everything important is PHP and Python. It was Perl 10 years ago. There is some Java, but not in the ETL subsystems.