> Still in all these years, Java was never used to sell Netbeans commercial licenses (...)
But that's completely irrelevant, isn't it? Cherry-picking aside, don't you understand how loss leaders work, and how companies use that strategy to push the sale of their cash cows?
Java has been owned by Sun, and then Oracle, and it was more closed source during Sun's stewardship than Oracle's.
The first lawsuit was done by Sun against Microsoft, and they only missed the one against Google, because they were out of money by them.
Unfortunately Google got away with screwing up Sun, not happy with that, they keep using they flavoured Android Java when selling Kotlin's push into the ecosystem.
Still in all these years, Java was never used to sell Netbeans commercial licenses, regardless of how you to try to change the music.