That's ridiculous. Firstly, all the Graal/Truffle/Ruby work is open source. The fact that they prefer not to maintain lots of different builds and their build infrastructure produces a mixed open/proprietary binary doesn't change the fact that you can get all the work for free.

Secondly, Oracle funded all of this work! Don't you think that's a little ungrateful? How relevant do you think faster Ruby even is to Oracle's core business? Less relevant than fast JS is to Google certainly, and yet, not only have they been funding a large cutting-edge research effort for years ... they gave the results away as open source too.

Sometimes I think people have lost perspective. I remember programming for Windows in the 1990s, when you were expected to pay for even basic things like treeview widgets or networking libraries. Now you get full blown JIT compilers for dynamic languages for nothing and people complain :(

You can still get the build with OpenJDK yourself i think, the reason they use Oracle JDK is that no body has access to it, bu having a build with Oracle JDK helps with this issue.